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| DAVICOM Semiconductor, Inc. DM8203 10/100 Mbps 2-port Ethernet Switch Controller With MII / RMII Interface DATA SHEET Preliminary Version: DM8203-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface CONTENT 1. 2. 3. 4. 5. GENERAL DESCRIPTION............................................................................................... 8 BLOCK DIAGRAM........................................................................................................... 8 FEATURES ...................................................................................................................... 9 PIN CONFIGURATION .................................................................................................. 10 PIN DESCRIPTION ........................................................................................................ 11 5.1 P2 MII / RMII / Reverse MII Interfaces....................................................................................................................... 11 5.1.1 MII Interfaces ......................................................................................................................................................... 11 5.1.2 RMII Interfaces ...................................................................................................................................................... 11 5.1.3 Reverse MII Interfaces ......................................................................................................................................... 12 5.2 EEPROM Interfaces....................................................................................................................................................... 12 5.3 LED Pins.......................................................................................................................................................................... 12 5.4 Clock Interface................................................................................................................................................................ 13 5.5 Network Interface........................................................................................................................................................... 13 5.6 Miscellaneous Pins.......................................................................................................................................................... 13 5.7 Power Pins....................................................................................................................................................................... 13 5.8 Strap pins table ............................................................................................................................................................... 14 6. CONTROL AND STATUS REGISTER SET................................................................... 15 6.1 EEPROM & PHY Control Register (0BH) .................................................................................................................. 16 2 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 6.2 EEPROM & PHY Address Register (0CH) ................................................................................................................. 16 6.3 EPROM & PHY Data Register (0DH~0EH) ................................................................................................................ 16 6.4 Vendor ID Register (28H~29H)..................................................................................................................................... 16 6.5 Product ID Register (2AH~2BH) .................................................................................................................................. 16 6.6 Port 2 driving capability Register (3AH)...................................................................................................................... 16 6.7 Switch Control Register (52H) ...................................................................................................................................... 17 6.8 VLAN Control Register (53H)....................................................................................................................................... 17 6.9 Switch Status Register (54H) ......................................................................................................................................... 17 6.10 Per Port Control/Status Index Register (60H) ........................................................................................................... 18 6.11 Per Port Control Data Register (61H) ........................................................................................................................ 18 6.12 Per Port Status Data Register (62H) ........................................................................................................................... 19 6.13 Per Port Forward Control Register (65H).................................................................................................................. 19 6.14 Per Port Ingress/Egress Control Register (66H)........................................................................................................ 20 6.15 Bandwidth Control Setting Register (67H) ................................................................................................................ 21 6.16 Per Port Block Unicast ports Control Register (68H) ............................................................................................... 21 6.17 Per Port Block Multicast ports Control Register (69H) ............................................................................................ 22 6.18 Per Port Block Broadcast ports Control Register (6AH) .......................................................................................... 22 6.19 Per Port Block Unknown ports Control Register (6BH)........................................................................................... 22 6.20 Per Port Priority Queue Control Register (6DH) ...................................................................................................... 22 6.21 Per Port VLAN Tag Low Byte Register (6EH) .......................................................................................................... 22 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 3 DM8203 2-port switch with MII / RMII Interface 6.22 Per Port VLAN Tag High Byte Register (6FH) ......................................................................................................... 23 6.23 MIB counters Port Index Register (80H).................................................................................................................... 23 6.24 MIB counter Data Register (81H~84H) ...................................................................................................................... 23 6.25 VLAN grouping table Registers (B0H~BFH)............................................................................................................. 24 6.26 TOS Priority Map Registers (C0H~CFH) .................................................................................................................. 24 6.27 VLAN Priority Map Registers (D0H~D1H) ............................................................................................................... 27 7. 8. EEPROM FORMAT........................................................................................................ 28 PHY REGISTERS .......................................................................................................... 31 8.1 Basic Mode Control Register (BMCR) - 00H .............................................................................................................. 32 8.2 Basic Mode Status Register (BMSR) - 01H ................................................................................................................. 33 8.3 PHY ID Identifier Register #1 (PHYID1) - 02H.......................................................................................................... 34 8.4 PHY ID Identifier Register #2 (PHYID2) - 03H.......................................................................................................... 34 8.5 Auto-negotiation Advertisement Register (ANAR) - 04H .......................................................................................... 35 8.6 Auto-negotiation Link Partner Ability Register (ANLPAR) - 05H ........................................................................... 36 8.7 Auto-negotiation Expansion Register (ANER) - 06H .................................................................................................. 37 8.8 DAVICOM Specified Configuration Register (DSCR) - 10H .................................................................................... 37 8.9 DAVICOM Specified Configuration and Status Register (DSCSR) - 11H ............................................................... 39 8.10 10BASE-T Configuration/Status (10BTCSR) - 12H ................................................................................................. 40 8.11 Power down Control Register (PWDOR) - 13H........................................................................................................ 40 8.12 (Specified config) Register - 14H ................................................................................................................................ 41 4 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 8.13 DAVICOM Specified Receive Error Counter Register (RECR) - 16H................................................................... 42 8.14 DAVICOM Specified Disconnect Counter Register (DISCR) - 17H ....................................................................... 42 8.15 Power Saving Control Register (PSCR) - 1DH.......................................................................................................... 42 9. FUNCTIONAL DESCRIPTION....................................................................................... 43 9.1 Serial Management Interface ........................................................................................................................................ 43 9.2 Switch function: .............................................................................................................................................................. 44 9.2.1 Address Learning .................................................................................................................................................. 44 9.2.2 Address Aging ....................................................................................................................................................... 44 9.2.3 Packet Forwarding ................................................................................................................................................ 44 9.2.4 Inter-Packet Gap (IPG)......................................................................................................................................... 44 9.2.5 Back-off Algorithm................................................................................................................................................. 44 9.2.6 Late Collision ......................................................................................................................................................... 44 9.2.7 Full Duplex Flow Control ...................................................................................................................................... 44 9.2.8 Half Duplex Flow Control ..................................................................................................................................... 44 9.2.9 Partition Mode........................................................................................................................................................ 45 9.2.10 Broadcast Storm Filtering .................................................................................................................................. 45 9.2.11 Bandwidth Control............................................................................................................................................... 45 9.2.12 Port Monitoring Support ..................................................................................................................................... 45 9.2.13 VLAN Support...................................................................................................................................................... 46 9.2.13.1 Port-Based VLAN ............................................................................................................................................ 46 9.2.13.2 802.1Q-Based VLAN....................................................................................................................................... 46 9.2.13.3 Tag/Untag ......................................................................................................................................................... 46 9.2.14 Priority Support.................................................................................................................................................... 47 9.2.14.1 Port-Based Priority .......................................................................................................................................... 47 9.2.14.2 802.1p-Based Priority...................................................................................................................................... 47 9.2.14.3 DiffServ-Based Priority.................................................................................................................................... 47 9.3 MII Interface................................................................................................................................................................... 48 9.3.1 MII data interface................................................................................................................................................... 48 9.3.2 MII Serial Management ........................................................................................................................................ 48 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 5 DM8203 2-port switch with MII / RMII Interface 9.3.3 Serial Management Interface .............................................................................................................................. 49 9.3.4 Management Interface - Read Frame Structure............................................................................................... 49 9.3.5 Management Interface - Write Frame Structure ............................................................................................... 49 9.4 Internal PHY functions .................................................................................................................................................. 50 9.4.1 100Base-TX Operation......................................................................................................................................... 50 9.4.1.1 4B5B Encoder .................................................................................................................................................... 50 9.4.1.2 Scrambler............................................................................................................................................................ 50 9.4.1.3 Parallel to Serial Converter .............................................................................................................................. 50 9.4.1.4 NRZ to NRZI Encoder ....................................................................................................................................... 50 9.4.1.5 MLT-3 Converter................................................................................................................................................ 50 9.4.1.6 MLT-3 Driver....................................................................................................................................................... 50 9.4.1.7 4B5B Code Group ............................................................................................................................................. 51 9.4.2 100Base-TX Receiver .......................................................................................................................................... 52 9.4.2.1 Signal Detect ...................................................................................................................................................... 52 9.4.2.2 Adaptive Equalization........................................................................................................................................ 52 9.4.2.3 MLT-3 to NRZI Decoder.................................................................................................................................... 52 9.4.2.4 Clock Recovery Module .................................................................................................................................... 52 9.4.2.5 NRZI to NRZ ....................................................................................................................................................... 52 9.4.2.6 Serial to Parallel ................................................................................................................................................. 52 9.4.2.7 Descrambler ....................................................................................................................................................... 52 9.4.2.8 Code Group Alignment...................................................................................................................................... 53 9.4.2.9 4B5B Decoder .................................................................................................................................................... 53 9.4.3 10Base-T Operation ............................................................................................................................................. 53 9.4.4 Collision Detection ................................................................................................................................................ 53 9.4.5 Carrier Sense......................................................................................................................................................... 53 9.4.6 Auto-Negotiation.................................................................................................................................................... 53 9.5 HP Auto-MDIX Functional Descriptions ..................................................................................................................... 53 10. DC AND AC ELECTRICAL CHARACTERISTICS ..................................................... 55 10.1 Absolute Maximum Ratings ........................................................................................................................................ 55 10.2 Operating Conditions ................................................................................................................................................... 55 6 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 10.3 DC Electrical Characteristics ...................................................................................................................................... 56 10.4 AC characteristics......................................................................................................................................................... 56 10.4.1 Power On Reset Timing..................................................................................................................................... 56 10.4.2 Port 2 MII Interface Transmit Timing................................................................................................................ 57 10.4.3 Port 2 MII Interface Receive Timing................................................................................................................. 57 10.4.4 MII Management or host SMI Interface Timing .............................................................................................. 58 10.4.5 EEPROM timing .................................................................................................................................................. 59 11. APPLICATION CIRCUIT ............................................................................................ 60 11.1 Main circuit................................................................................................................................................................... 60 11.2 Application of Reverse MII.......................................................................................................................................... 61 12. 13. PACKAGE INFORMATION........................................................................................ 62 ORDERING INFORMATION ...................................................................................... 63 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 7 DM8203 2-port switch with MII / RMII Interface 1. General Description The DM8203 is a fully integrated, high performance, and cost-effective fast Ethernet switch controller, two ports 10M/100Mbps PHY, and one port MII, Reverse MII or RMII interface. The DM8203 with two ports 10M/100Mbps PHY, and one port MII, Reverse MII or RMII interface is a fully integrated, high performance, and cost-effective fast Ethernet switch controller The internal memory of the DM8203 supports up to 1K uni-cast MAC address table, it is provided for three ports' usage. Each port of the DM8203 provides four priorities transmit queues that can be defined by port-based, 802.1p VLAN, or IP packet ToS field automatically, to fit the various bandwidth and latency requirement of data, voice, and video application. Besides, it's internal memory has three ports usage, supporting up to 1K uni-case MAC address table. Each port of DM8203 provides four priorities transmit queens that can be defined by port-based, 802.1p VLAN, or IP packet ToS field automatically, applies to the various bandwidth and latency requirement of data, voice, and video application. Each port also supports ingress and/or egress rate control to provide proper bandwidth. And up to 16 groups of 802.1Q VLAN with Tag/Un-tag functions are supported to provide efficient packet forwarding. Each port, provide the MIB counters and loop-back capability and the build in memory self test (BIST) for system and board level diagnostic. For proper bandwidth, each port also supports ingress and/or egress rate control, and up to 16 groups of 802.1Q VLAN with Tag/Un-tag functions support packet forwarding efficiently. Each port provides the MIB counters, loop-back capability and the build in memory self test (BIST) for system and board level diagnostic. The integrated two ports PHY are compliant with IEEE 802.3u standards. The MII interface provides the flexibility to connect Ethernet PHY, and it can be configured to Reversed MII interface for SoC with MII interface. An alternative interface, the RMII interface, is also provided to connect the lower pin count Ethernet PHY or SoC with RMII interface. 2. Block Diagram Switch Engine Switch Fabric Port 0 MDI / MDIX 10/100M PHY 10/100M MAC Embedded Memory Memory BIST Port 1 MDI / MDIX 10/100M PHY 10/100M MAC Switch Controller Memory Management Port 2 MII / RMII / Reverse MII 10/100M MAC LED Control LEDs SMI I/F Control Registers MIB Counters EEPROM Interface EEPROM 8 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 3. Features Ethernet Switch with two 10/100Mbps PHY, one MII/RMII Support Reverse-MII EEPROM interface for power up configurations Support HP Auto-MDIX Support IEEE 802.3x Flow Control in Full-duplex mode Support Back Pressure Flow Control in Half-duplex mode Per port support 4 priority queues by Port-based, 802.1P VLAN, and IP TOS priority Support 802.1Q VLAN up-to 16 VLAN group Support VLAN ID tag/untag options Per port support bandwidth, ingress and egress rate control Support Broadcast Storming filter function Support Store and Forward switching approach Support up-to 1K Uni-cast MAC addresses Support Serial data management interface Automatic aging scheme Support MIB counters for diagnostic 64-pin LQFP 1.8V/3.3V dual power and 3.3V I/O with 5V tolerant Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 9 DM8203 2-port switch with MII / RMII Interface 4. Pin Configuration 64 pin LQFP: BGGND BGRES AVDD AVDDI 42 39 38 37 36 35 45 43 41 40 48 VCNTL VREF VCC3 X1 X2 GND LNK1_LED SPD1_LED LNK0_LED SPD0_LED TEST2 SMI_CK VCCI SMI_DIO TEST3 GND 49 50 51 52 47 46 44 34 33 AVDDI AGND AGND AVDD RX0+ RX1+ TX0TX0+ TX1+ RX0- RX1- TX1- 32 31 30 29 28 27 26 DM8203 25 24 23 22 21 20 19 18 17 10 11 12 13 14 15 3 4 16 1 2 5 6 7 8 9 TEST1 GND PWRST# EECS EECK EEDIO VCC3 RXD2_0 RXD2_1 GND RXD2_2 RXD2_3 RXDV2 RXC2 RXER COL2 53 54 55 56 57 58 59 60 61 62 63 64 MDIO MDC TXE2 VCCI TXER2 CRS2 VCC3 VCC3 GND GND TXD2_3 TXD2_1 10 TXD2_2 TXD2_0 TXC2 GND Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 5. Pin Description I = Input, O = Output, I/O = Input / Output, O/D = Open Drain, P = Power, PD=internal pull-low (about 50K Ohm) # = asserted Low 5.1 P2 MII / RMII / Reverse MII Interfaces 5.1.1 MII Interfaces Pin No. 2 3 5,6,7,9 10 12 14 15 17 18 19 20 21,22,24,25 Pin Name MDC MDIO TXD2_3~0 TXE2 TXC2 TXER2 CRS2 COL2 RXER2 RXC2 RXDV2 RXD2_3~0 I/O O,PD I/O O,PD O,PD I/O O,PD I/O I/O I I I I Description MII Serial Management Data Clock MII Serial Management Data Port 2 MII Transmit Data 4-bit nibble data outputs (synchronous to the TXC2) Port 2 MII Transmit Enable Port 2 MII Transmit Clock. Port 2 MII Transmit Error Port 2 MII Carrier Sense Port 2 MII Collision Detect. Port 2 MII Receive Error Port 2 MII Receive Clock Port 2 MII Receive Data Valid Port 2 MII Receive Data 4-bit nibble data input (synchronous to RXC2) 5.1.2 RMII Interfaces Pin No. 2 3 5,6 7,9 10 12 14 15 17 18 19 20 21,22 24,25 Pin Name MDC MDIO TXD2_3~2 TXD2_1~0 TXE2 TXC2 TXER2 CRS2 COL2 RXER2 RXC2 RXDV2 RXD2_3~2 RXD2_1~0 I/O O,PD I/O O,PD O,PD O,PD O O I I I I I I I Description MII Serial Management Data Clock MII Serial Management Data Reserved RMII Transmit Data RMII Transmit Enable. Reserved Port 2 MII Transmit Error RMII CRS_DV Reserved, tie to ground in application. Reserved, tie to ground in application. 50MHz reference clock. Reserved, tie to ground in application. Reserved, tie to ground in application. RMII Receive Data. Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 11 DM8203 2-port switch with MII / RMII Interface 5.1.3 Reverse MII Interfaces Pin No. Pin Name 2 3 5,6,7,9 10 12 14 15 17 18 19 20 21,22,24,25 MDC MDIO TXD2_3~0 TXE2 TXC2 TXER2 CRS2 COL2 RXER2 RXC2 RXDV2 RXD2_3~0 I/O O,PD I/O O,PD O,PD O O,PD O O I I I I Description Reserved Reserved Port 2 MII Transmit Data 4-bit nibble data outputs (synchronous to the TXC2) Port 2 MII Transmit Enable 25MHz clock output Port 2 MII Transmit Error Port 2 carrier sense output when TXE2 or RXDV2 asserted. Port 2 collision output when TXE2 and RXDV2 asserted. Port 2 MII Receive Error Port 2 MII Receive Clock Port 2 MII Receive Data Valid Port 2 MII Receive Data 4-bit nibble data input (synchronous to RXC2) 5.2 EEPROM Interfaces Pin No. 27 28 29 Pin Name EEDIO EECK EECS I/O I/O O,PD O,PD Description EEPROM Data In/Out EEPROM Serial Clock This pin is used as the clock for the EEPROM data transfer. EEPROM Chip Selection. 5.3 LED Pins Pin No. 55 Pin Name LNK1_LED I/O O Description Port 1 Link / Active LED It is the combined LED of link and carrier sense signal of the internal PHY1 Port 1 Speed LED Its low output indicates that the internal PHY1 is operated in 100M/S, or it is floating for the 10M mode of the internal PHY1 Port 0 Link / Active LED It is the combined LED of link and carrier sense signal of the internal PHY0 Port 0 Speed LED Its low output indicates that the internal PHY0 is operated in 100M/S, or it is floating for the 10M mode of the internal PHY0 56 SPD1_LED O 57 LNK0_LED O 58 SPD0_LED O 12 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 5.4 Clock Interface Pin No. 52 53 5.5 Network Interface Pin No. 34,35 Pin Name X1 X2 I/O I O Crystal 25MHz In Crystal 25MHz Out Description Pin Name TX1+/- I/O I/O Description Port 1 TP TX These two pins are the Twisted Pair transmit in MDI mode or receive in MDIX mode. Port 1 TP RX These two pins are the Twisted Pair receive in MDI mode or transmit in MDIX mode. Port 0 TP TX These two pins are the Twisted Pair transmit in MDI mode or receive in MDIX mode. Port 0 TP RX These two pins are the Twisted Pair receive in MDI mode or transmit in MDIX mode. Band gap Pin Connect a 1.4K resistor to BGGND in application. Band gap Ground 1.8V Voltage control Voltage Reference Connect a 0.1u capacitor to ground in application. 37,38 RX1+/- I/O 41,42 TX0+/- I/O 44,45 RX0+/- I/O 47 48 49 50 BGRES BGGND VCNTL VREF I/O P I/O O 5.6 Miscellaneous Pins Pin No. 30 60 62 32 59 63 5.7 Power Pins Pin No. 1,13,26,51 11,61 4,8,16,23,31,54,64 39,46 33,40 36,43 Pin Name PWRST# SMI_CK SMI_DIO TEST1 TEST2 TEST3 I/O I Description Power on Reset Low active with minimum 1ms I Serial data management interface clock I/O Serial data management interface in / out I,PD Tie to VCC3 in application I,PD Tie to GND in application I,PD Tie to VCC3 in application Pin Name VCC3 VCCI GND AVDD3 AVDDI AGND I/O P P P P P P Description Digital 3.3V Internal 1.8V core power Digital GND Analog 3.3V power Analog 1.8V power Analog GND Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 13 DM8203 2-port switch with MII / RMII Interface 5.8 Strap pins table 1: pull-high 1K~10K, 0: floating (default). Pin No. Pin Name Description 28 29 14 2 5 6 EECK EECS TXER2 MDC TXD2_3 TXD2_2 7 9 10 TXD2_1 TXD2_0 TXE2 0: Port 2 in force 10 Mbps mode 1: Port 2 in force 100 Mbps mode 0: Port 0 is TP mode 1: Port 0 is Fiber mode 0: Port 1 is TP mode 1: Port 1 is Fiber mode 0: BIST 1: Bypass BIST TXD2_3 TXD2_2 Mode 0 0 MII mode 0 1 Reverse MII mode 1 0 RMII mode 1 1 Reserved (DO NOT USE) SMI device address 1 SMI device address 0 0: Port 2 normal mode 1: Port 2 force mode 14 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 6. Control and Status Register Set The DM8203 implements several control and status registers, which can be accessed by the serial management interface. These CSRs are byte aligned. All CSRs are set to Register Description their default values by hardware or software reset unless specified Offset Default value after reset 00H 40H XXH XXH 0A46H 8203H 21H 00H 00H 00H 0000H 00H 00H 00H 00H 00H 00H 00H 00H 00H 00H 01H 00H 00H 00H 00H 00H 00H 0FH 00H~FFH 50H,FAH EPCR EEPROM & PHY Control Register 0BH EPAR EEPROM & PHY Address Register 0CH EPDRL EEPROM & PHY Low Byte Data Register 0DH EPDRH EEPROM & PHY High Byte Data Register 0EH VID Vendor ID 28H-29H PID Product ID 2AH-2BH P2FRV Port 2 driving capability Register 3AH SWITCHCR SWITCH Control Register 52H VLANCR VLAN Control Register 53H SWITCHSR SWITCH Status Register 54H DSP1,2 DSP Control Register I,II 58H~59H P_INDEX Per Port Control/Status Index Register 60H P_CTRL Per Port Control Data Register 61H P_STUS Per Port Status Data Register 62H P_RATE Per Port Ingress and Egress Rate Control Register 66H P_BW Per Port Bandwidth Control Register 67H P_UNICAST Per Port Block Unicast ports Control Register 68H P_MULTI Per Port Block Multicast ports Control Register 69H P_BCAST Per Port Block Broadcast ports Control Register 6AH P_UNKNWN Per Port Block Unknown ports Control Register 6BH P_PRI Per Port Priority Queue Control Register 6DH VLAN_TAGL Per Port VLAN Tag Low Byte Register 6EH VLAN_TAGH Per Port VLAN Tag High Byte Register 6FH P_MIB_IDX Per Port MIB counter Index Register 80H MIB_DAT MIB counter Data Register bit 0~7 81H MIB_DAT MIB counter Data Register bit 8~15 82H MIB_DAT MIB counter Data Register bit 16~23 83H MIB_DAT MIB counter Data Register bit 24~31 84H PVLAN Port-based VLAN mapping table registers B0-BFH TOS_MAP TOS Priority Map Register C0-CFH VLAN_MAP VLAN priority Map Register D0-D1H Key to Default In the register description that follows, the default column E = default value from EEPROM setting takes the form: T = default value from strap pin Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 15 DM8203 2-port switch with MII / RMII Interface 6.1 EEPROM & PHY Control Register (0BH) Bit Name Default Description 7:6 RESERVED 0,RO Reserved 5 REEP PH0,RW Reload EEPROM. Driver needs to clear it up after the operation completes 4 WEP PH0,RW Write EEPROM Enable 3 EPOS PH0,RW EEPROM or PHY Operation Select When reset, select EEPROM; when set, select PHY 2 ERPRR PH0,RW EEPROM Read or PHY Register Read Command. Driver needs to clear it up after the operation completes. 1 ERPRW PH0,RW EEPROM Write or PHY Register Write Command. Driver needs to clear it up after the operation completes. 0 ERRE PH0,RO EEPROM Access Status or PHY Access Status When set, it indicates that the EEPROM or PHY access is in progress 6.2 EEPROM & PHY Address Register (0CH) Bit Name Default Description 7:6 PHY_ADR PH01,RW PHY Address bit 1 and 0; the PHY address bit [4:2] is force to 0. 5:0 EROA PH0,RW EEPROM Word Address or PHY Register Address 6.3 EPROM & PHY Data Register (0DH~0EH) Bit Name Default Description 7:0 EE_PHY_L PH0,RW EEPROM or PHY Low Byte Data (0DH) This data is made to write/read low byte of word address defined in Reg. CH to EEPROM or PHY 7:0 EE_PHY_H PH0,RW EEPROM or PHY High Byte Data (0EH) This data is made to write/read high byte of word address defined in Reg. CH to EEPROM or PHY 6.4 Vendor ID Register (28H~29H) Bit Name Default 7:0 VIDH PE,0AH,RO Vendor ID High Byte (29H) 7:0 VIDL PE,46H.RO Vendor ID Low Byte (28H) 6.5 Product ID Register (2AH~2BH) Bit Name Default 7:0 PIDH PE,82H,RO Product ID High Byte (2BH) 7:0 PIDL PE,03H.RO Product ID Low Byte (2AH) Description Description 6.6 Port 2 driving capability Register (3AH) Bit Name Default Description 7 Reserved 0,RO Reserved Port 2 TXD/TXE Driving/Sinking Capability 6:5 00: 2mA P2_CURR P01,RW 01: 4mA (default) 10: 6mA 11: 8mA 4:0 RESERVED P01,RW reserved 16 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 6.7 Switch Control Register (52H) Bit Name Default Description 7 MEM_BIST PH0,RO Address Table Memory Test BIST Status 0: OK 1: Fail 6 RST_SW P0,RW Reset Switch Core and auto clear after 10us 5 RST_ANLG P0,RW Reset Analog PHY Core and auto clear after 10us 4:3 SNF_PORT PE00,RW Sniffer Port Number Define the port number to act as the sniffer port 00 Port 0 01 Port 1 10 Port 2 11 Reserved 2 CRC_DIS PE0,RW CRC Checking Disable When set, the received CRC error packet also accepts to receive memory. 1:0 AGE PE0,RW Address Table Aging 00: no aging 01: 64 32 sec 10: 128 64 sec 11: 256 128 sec 6.8 VLAN Control Register (53H) Bit Name Default Description 7 TOS6 PE0,RW Full IP ToS Field for Priority Queue 1: check most significant 6-bit of TOS 0: check most significant 3-bit only of TOS 6 RESERVED 0,RO Reserved 5 UNICAST PE0,RW Unicast packet can across VLAN boundary 4 VIDFF PE0,RW Replace VIDFF If the received packet is a tagged VLAN with VID equal to "FFF", its VLAN field is replaced with VLAN tag defined in Reg. 6EH and 6FH. 3 VID1 PE0,RW Replace VID01 If the received packet is a tagged VLAN with VID equal to "001", its VLAN field is replaced with VLAN tag defined in Reg. 6EH and 6FH. 2 VID0 PE0,RW Replace VID0 If the received packet is a tagged VLAN with VID equal to "000", its VLAN field is replaced with VLAN tag defined in Reg. 6EH and 6FH. 1 PRI PE0,RW Replace priority field in the tag with value define in Reg 6FH bit 7~5. 0 VLAN PE0,RW VLAN mode enable 1: 802.1Q base VLAN mode enable 0: port-base VLAN only 6.9 Switch Status Register (54H) Bit Name Default Description 7 MEM_BIST PH0,RO Address Table Memory Test BIST Status 0: OK 1: Fail 6:0 RESERVED 0,RO Reserved Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 17 DM8203 2-port switch with MII / RMII Interface 6.10 Per Port Control/Status Index Register (60H) Bit Name Default Description 7:5 reserved PH0,RW reserved 4:2 reserved 0,RO reserved 1:0 INDEX PH0,RW Port index for register 61h~84h Write the port number to this register before write/read register 61h~84h. 6.11 Per Port Control Data Register (61H) Bit Name Default Description 7 RESERVED PE0,RW Reserved 6 PARTI_EN PE0,RW Enable Partition Detection 5 NO_DIS_RX PE0,RW Not Discard RX Packets when Ingress Bandwidth Control When received packets bandwidth reach Ingress bandwidth threshold, the packets over the threshold are not discarded but with flow control. 4 FLOW_DIS PE0,RW Flow control in full duplex mode, or back pressure in half duplex mode enable 0 - enable 1 - disable 3 BANDWIDTH PE0,RW Bandwidth Control 0: Control with Ingress and Egress separately, ref to Register 66h. 1: Control with Ingress or Egress, ref to Register 67h 2 BP_DIS PE0,RW Broadcast packet filter 0 - accept broadcast packets 1 - reject broadcast packets 1 MP_DIS PE0,RW Multicast packet filter 0 - accept multicast packets 1 - reject multicast packets 0 MP_STORM PE0,RW Broadcast Storm Control 0 - only broadcast packets storm are controlled 1 - Multicast packets also same as broadcast storm control. 18 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 6.12 Per Port Status Data Register (62H) Bit Name Default Description 7:6 RESERVED P0,RO Reserved 5 LP_FCS P0,RO Link Partner Flow Control Enable Status 4 BIST P0,RO BIST status 1: SRAM BIST fail 0: SRAM BIST pass 3 RESERVED 0,RO Reserved 2 SPEED2 P0,RO PHY Speed Status 0: 10Mbps, 1:100Mbps 1 FDX2 P0,RO PHY Duplex Status 0: half-duplex, 1:full-duplex 0 LINK2 P0,RO PHY Link Status 0: link fail, 1: link OK 6.13 Per Port Forward Control Register (65H) Bit Name Default Description LOOPBACK PH0,RW Loop-Back Mode 7 The transmitted packet will be forward to this port itself. 6 MONI_TX PH0,RW TX Packet Monitored The transmitted packets are also forward to sniffer port. 5 MONI_RX PH0,RW RX Packet Monitored The received packets are also forward to sniffer port. 4 DIS_BMP PH0,RW Broad/Multicast Not Monitored The received broadcast or multicast packets are not forward to sniffer port. 3 Reserved PH0,RW Reserved 2 TX_DIS PH0,RW Packet Transmit Disabled All packets can not be forward to this port. 1 RX_DIS PH0,RW Packet receive Disabled All received packets are discarded. 0 ADR_DIS PH0,RW Address Learning Disabled The Source Address (SA) field of packet is not learned to address table. Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 19 DM8203 2-port switch with MII / RMII Interface 6.14 Per Port Ingress/Egress Control Register (66H) Bit Name Default Description 7:4 INGRESS PE0,RW Ingress Rate Control These bits define the bandwidth threshold that received packets over the threshold are discarded. 0000: none 0001: 64Kbps 0010: 128Kbps 0011: 256Kbps 0100: 512Kbps 0101: 1Mbps 0110: 2Mbps 0111: 4Mbps 1000: 8Mbps 1001: 16Mbps 1010: 32Mbps 1011: 48Mbps 1100: 64Mbps 1101: 72Mbps 1110: 80Mbps 1111: 88Mbps 3:0 EGRESS PE0,RW Egress Rate Control These bits define the bandwidth threshold that transmitted packets over the threshold are discarded. 0000: none 0001: 64Kbps 0010: 128Kbps 0011: 256Kbps 0100: 512Kbps 0101: 1Mbps 0110: 2Mbps 0111: 4Mbps 1000: 8Mbps 1001: 16Mbps 1010: 32Mbps 1011: 48Mbps 1100: 64Mbps 1101: 72Mbps 1110: 80Mbps 1111: 88Mbps 20 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 6.15 Bandwidth Control Setting Register (67H) Bit Name Default Description 7:4 BSTH PE0,RW Broadcast Storm Threshold These bits define the bandwidth threshold that received broadcast packets over the threshold are discarded 0000: no broadcast storm control 0001: 8K packets/sec 0010: 16K packets/sec 0011: 64K packets/sec 0100: 5% 0101: 10% 0110: 20% 0111: 30% 1000: 40% 1001: 50% 1010: 60% 1011: 70% 1100: 80% 1101: 90% 111X: no broadcast storm control 3:0 BW CTRL PE0,RW Received and Transmitted Bandwidth Control These bits define the bandwidth threshold that transmitted or received packets over the threshold are discarded 0000: none 0001: 64Kbps 0010: 128Kbps 0011: 256Kbps 0100: 512Kbps 0101: 1Mbps 0110: 2Mbps 0111: 4Mbps 1000: 8Mbps 1001: 16Mbps 1010: 32Mbps 1011: 48Mbps 1100: 64Mbps 1101: 72Mbps 1110: 80Mbps 1111: 88Mbps 6.16 Per Port Block Unicast ports Control Register (68H) Bit Name Default Description 7:4 RESERVED PH0,RW Reserved 3:0 BLK_UP PH0,RW Ports of Unicast Packet Be Blocked The received unicast packets are not forward to the assigned ports. Note that the assigned port definition: bit 0 for port 0, bit 1 for port 1, Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 21 DM8203 2-port switch with MII / RMII Interface 6.17 Per Port Block Multicast ports Control Register (69H) Bit Name Default Description 7:4 RESERVED PH0,RW Reserved 3:0 BLK_MP PH0,RW Ports of Multicast Packet Be Blocked The received multicast packets are not forward to the assigned ports. 6.18 Per Port Block Broadcast ports Control Register (6AH) Bit Name Default Description 7:4 RESERVED PH0,RW Reserved 3:0 BLK_BP PH0,RW Ports of Broadcast Packet Be Blocked The received broadcast packets are not forward to the assigned ports. 6.19 Per Port Block Unknown ports Control Register (6BH) Bit Name Default Description 7:4 RESERVED PH0,RW Reserved 3:0 BLK_UKP PH0,RW Ports of Unknown Packet Be Blocked The packets with DA field not found in address table are not forward to the assigned ports. 6.20 Per Port Priority Queue Control Register (6DH) Bit Name Default Description 7 TAG_OUT PE0,RW Output Packet Tagging Enable The transmitted packets are containing VLAN tagged field. 6 PRI_DIS PE0,RW Priority Queue Disable Only one transmit queue is supported in this port. 5 WFQUE PE0,RW Weighted Fair Queuing 1: The priority weight for queue 3, 2, 1, and 0 is 8, 4, 2, and 1 respectively. 0: The queue 3 has the highest priority, and the next priorities are queue 2, 1, and 0 respectively. 4 TOS_PRI PE0,RW Priority ToS over VLAN If an IP packet with VLAN tag, the priority of this packet is decode from ToS field. 3 TOS_OFF PE0,RW ToS Priority Classification Disable The priority information from ToS field of IP packet is ignored. 2 PRI_OFF PE0,RW 802.1 p Priority Classification Disable The priority information from VLAN tag field is ignored. 1:0 P_PRI PE0,RW Port Base priority The priority queue number in port base. 00= queue 0, 01=queue 1, 10=queue 2, 11=queue 3 6.21 Per Port VLAN Tag Low Byte Register (6EH) Bit Name Default 7:0 VID70 PE01,RW VID[7:0] Description 22 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 6.22 Per Port VLAN Tag High Byte Register (6FH) Bit Name Default 7:5 PRI PE0,RW Tag [15:13] 4 CFI PE0,RW Tag[12] 3:0 VID118 PE0,RW VID[11:8] Description 6.23 MIB counters Port Index Register (80H) Bit Name Default Description 7 READY P0,RO MIB counter data is ready When this register is written with INDEX data, this bit is cleared and the MIB counter reading is in progress. After end of read MIB counter, the MIB data is loaded into register 81H~84H, and this bit is set to indicate that the MIB data is ready. 6:5 reserved 0,RO Reserved 4:0 INDEX PHS0,RW MIB counter index 0~9, each counter is 32-bit in Register 81h~84h. Write the MIB counter index to this register before read them. 6.24 MIB counter Data Register (81H~84H) Bit Name Default 81H Counter0 X,RO Counter's data bit 7~0 82H Counter1 X,RO Counter's data bit 15~8 83H Counter2 X,RO Counter's data bit 23~16 84H Counter3 X,RO Counter's data bit 31~24 MIB counter: RX Byte Counter Registers (INDEX 00H) MIB counter: RX Uni-cast Packet Counter Registers (INDEX 01H) MIB counter: RX Multi-cast Packet Counter Registers (INDEX 02H) MIB counter: RX Discard Packet Counter Registers (INDEX 03H) MIB counter: RX Error Packet Counter Registers (INDEX 04H) MIB counter: TX Byte Counter Registers (INDEX 05H) MIB counter: TX Uni-cast Packet Counter Registers (INDEX 06H) MIB counter: TX Multi-cast Packet Counter Registers (INDEX 07H) MIB counter: TX Discard Packet Counter Registers (INDEX 08H) MIB counter: TX Error Packet Counter Registers (INDEX 09H) Description Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 23 DM8203 2-port switch with MII / RMII Interface 6.25 VLAN grouping table Registers (B0H~BFH) Define the port member in VLAN group There are 16 VLAN group that defined in Reg. B0H~BFH. Group 0 defined in Reg. B0H, and group 1 defined in Reg. B1H ... and so on. Bit Name Default Description 7:4 RESERVED PE0,RO Reserved 2 PORT_P2 PE1,RW Mapping to port 2 1 PORT_P1 PE1,RW Mapping to port 1 0 PORT_P0 PE1,RW Mapping to port 0 6.26 TOS Priority Map Registers (C0H~CFH) Define the 6-bit or 3-bit of ToS field mapping to 2-bit priority queue number. In 6-bit type, the Reg. 53H bit 7 is "1", Reg. C0H bit [1:0] define the mapping for ToS value 0, Reg. 60H bit [3:2] define the mapping for ToS value 1, ... and so on, till Reg. CFH bit [7:6] define ToS value 63. In 3-bit type, Reg. C0H bit [1:0] defines the mapping for ToS value 0, Reg. 60H bit [3:2] defines the mapping for ToS value 1 ... and so on, and till Reg. C1H bit [7:6] define ToS value 7. C0H: Bit 7:6 5:4 3:2 1:0 C1H: Bit 7:6 5:4 3:2 1:0 C2H: Bit 7:6 5:4 3:2 1:0 C3H: Bit 7:6 5:4 3:2 1:0 Name TOSF TOSE TOSD TOSC Default PE0,RW PE0,RW PE0,RW PE0,RW Description If bit 53H.7 =1 :TOS[7:2]=0FH If bit 53H.7 =1 :TOS[7:2]=0EH If bit 53H.7 =1 :TOS[7:2]=0DH If bit 53H.7 =1 :TOS[7:2]=0CH Name TOSB TOSA TOS9 TOS8 Default PE0,RW PE0,RW PE0,RW PE0,RW Description If bit 53H.7 =1 :TOS[7:2]=0BH If bit 53H.7 =1 :TOS[7:2]=0AH If bit 53H.7 =1 :TOS[7:2]=09H If bit 53H.7 =1 :TOS[7:2]=08H Name TOS7 TOS6 TOS5 TOS4 Default PE0/3,RW PE0/3,RW PE0/2,RW PE0/2,RW Description If bit 53H.7 =1 :TOS[7:2]=07H, otherwise TOS]7:5]=07H If bit 53H.7 =1 :TOS[7:2]=06H, otherwise TOS]7:5]=06H If bit 53H.7 =1 :TOS[7:2]=05H, otherwise TOS]7:5]=05H If bit 53H.7 =1 :TOS[7:2]=04H, otherwise TOS]7:5]=04H Name TOS3 TOS2 TOS1 TOS0 Default PE0/1,RW PE0,/1RW PE0,RW PE0,RW Description If bit 53H.7 =1 :TOS[7:2]=03H, otherwise TOS]7:5]=03H If bit 53H.7 =1 :TOS[7:2]=02H, otherwise TOS]7:5]=02H If bit 53H.7 =1 :TOS[7:2]=01H, otherwise TOS]7:5]=01H If bit 53H.7 =1 :TOS[7:2]=00H, otherwise TOS]7:5]=00H 24 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface C4H: Bit 7:6 5:4 3:2 1:0 C5H: Bit 7:6 5:4 3:2 1:0 C6H: Bit 7:6 5:4 3:2 1:0 C7H: Bit 7:6 5:4 3:2 1:0 C8H: Bit 7:6 5:4 3:2 1:0 C9H: Bit 7:6 5:4 3:2 1:0 Name TOS27 TOS26 TOS25 TOS24 Default PE2,RW PE2,RW PE2,RW PE2,RW Description If bit 53H.7 =1 :TOS[7:2]=27H If bit 53H.7 =1 :TOS[7:2]=26H If bit 53H.7 =1 :TOS[7:2]=25H If bit 53H.7 =1 :TOS[7:2]=24H Name TOS23 TOS22 TOS21 TOS20 Default PE2,RW PE2,RW PE2,RW PE2,RW Description If bit 53H.7 =1 :TOS[7:2]=23H If bit 53H.7 =1 :TOS[7:2]=22H If bit 53H.7 =1 :TOS[7:2]=21H If bit 53H.7 =1 :TOS[7:2]=20H Name TOS1F TOS1E TOS1D TOS1C Default PE1,RW PE1,RW PE1,RW PE1,RW Description If bit 53H.7 =1 :TOS[7:2]=1FH If bit 53H.7 =1 :TOS[7:2]=1EH If bit 53H.7 =1 :TOS[7:2]=1DH If bit 53H.7 =1 :TOS[7:2]=1CH Name TOS1B TOS1A TOS19 TOS18 Default PE1,RW PE1,RW PE1,RW PE1,RW Description If bit 53H.7 =1 :TOS[7:2]=1BH If bit 53H.7 =1 :TOS[7:2]=1AH If bit 53H.7 =1 :TOS[7:2]=19H If bit 53H.7 =1 :TOS[7:2]=18H Name TOS17 TOS16 TOS15 TOS14 Default PE1,RW PE1,RW PE1,RW PE1,RW Description If bit 53H.7 =1 :TOS[7:2]=17H If bit 53H.7 =1 :TOS[7:2]=16H If bit 53H.7 =1 :TOS[7:2]=15H If bit 53H.7 =1 :TOS[7:2]=14H Name TOS13 TOS12 TOS11 TOS10 Default PE1,RW PE1,RW PE1,RW PE1,RW Description If bit 53H.7 =1 :TOS[7:2]=13H If bit 53H.7 =1 :TOS[7:2]=12H If bit 53H.7 =1 :TOS[7:2]=11H If bit 53H.7 =1 :TOS[7:2]=10H Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 25 DM8203 2-port switch with MII / RMII Interface CAH: Bit 7:6 5:4 3:2 1:0 CBH: Bit 7:6 5:4 3:2 1:0 CCH: Bit 7:6 5:4 3:2 1:0 CDH: Bit 7:6 5:4 3:2 1:0 CEH: Bit 7:6 5:4 3:2 1:0 CFH: Bit 7:6 5:4 3:2 1:0 Name TOS3F TOS3E TOS3D TOS3C Default PE3,RW PE3,RW PE3,RW PE3,RW Description If bit 53H.7 =1 :TOS[7:2]=3FH If bit 53H.7 =1 :TOS[7:2]=3EH If bit 53H.7 =1 :TOS[7:2]=3DH If bit 53H.7 =1 :TOS[7:2]=3CH Name TOS3B TOS3A TOS39 TOS38 Default PE3,RW PE3,RW PE3,RW PE3,RW Description If bit 53H.7 =1 :TOS[7:2]=3BH If bit 53H.7 =1 :TOS[7:2]=3AH If bit 53H.7 =1 :TOS[7:2]=39H If bit 53H.7 =1 :TOS[7:2]=38H Name TOS37 TOS36 TOS35 TOS34 Default PE3,RW PE3,RW PE3,RW PE3,RW Description If bit 53H.7 =1 :TOS[7:2]=37H If bit 53H.7 =1 :TOS[7:2]=36H If bit 53H.7 =1 :TOS[7:2]=35H If bit 53H.7 =1 :TOS[7:2]=34H Name TOS33 TOS32 TOS31 TOS30 Default PE3,RW PE3,RW PE3,RW PE3,RW Description If bit 53H.7 =1 :TOS[7:2]=33H If bit 53H.7 =1 :TOS[7:2]=32H If bit 53H.7 =1 :TOS[7:2]=31H If bit 53H.7 =1 :TOS[7:2]=30H Name TOS2F TOS2E TOS2D TOS2C Default PE2,RW PE2,RW PE2,RW PE2,RW Description If bit 53H.7 =1 :TOS[7:2]=2FH If bit 53H.7 =1 :TOS[7:2]=2EH If bit 53H.7 =1 :TOS[7:2]=2DH If bit 53H.7 =1 :TOS[7:2]=2CH Name TOS2B TOS2A TOS29 TOS28 Default PE2,RW PE2,RW PE2,RW PE2,RW Description If bit 53H.7 =1 :TOS[7:2]=2BH If bit 53H.7 =1 :TOS[7:2]=2AH If bit 53H.7 =1 :TOS[7:2]=29H If bit 53H.7 =1 :TOS[7:2]=28H 26 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 6.27 VLAN Priority Map Registers (D0H~D1H) Define the 3-bit of priority field VALN mapping to 2-bit priority queue number. D0H: Bit 7:6 5:4 3:2 1:0 D1H: Bit 7:6 5:4 3:2 1:0 Name TAG7 TAG6 TAG5 TAG4 Default PE3,RW PE3,RW PE2,RW PE2,RW Description VLAN priority tag value = 07H VLAN priority tag value = 06H VLAN priority tag value = 05H VLAN priority tag value = 04H Name TAG3 TAG2 TAG1 TAG0 Default PE1,RW PE1,RW PE0,RW PE0,RW Description VLAN priority tag value = 03H VLAN priority tag value = 02H VLAN priority tag value = 01H VLAN priority tag value = 00H Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 27 DM8203 2-port switch with MII / RMII Interface 7. EEPROM Format name RESERVED Auto Load Control Vendor ID Product ID RESERVED PHY Control RESERVED Control Word 0~2 3 4 5 6 7 8~15 16 Description Reserved [1:0] Auto Load Control Vendor ID Product ID Reserved PHY Control Reserved Bit 1:0=01: Accept setting of WORD 17,18 Bit 3:2=01: Accept setting of WORD 19~26 Bit 5:4=01: Accept setting of WORD 27~30 Bit 7:6=01: Accept setting of WORD 31 Bit 9:8=01: Accept setting of WORD 32~39 Bit 11:10=01: Accept setting of WORD 40~47 Bit 15:12 =01: Reserved When word 16 bit 1:0 is "01", after power on reset: This word bit 7~0 will be loaded to Reg. 52H bit 7~0 This word bit 15~8 will be loaded to Reg. 53H bit 7~0 When word 16 bit 1:0 is "01", after power on reset: This word bit 7~0 will be loaded to Reg. 58H bit 7~0 This word bit 15~8 will be loaded to Reg. 59H bit 7~0 When word 16 bit 3:2 is "01", after power on reset: This word bit 7~0 will be loaded to port 0 Reg. 61H bit 7~0 This word bit 15~8 will be loaded to port 0 Reg. 66H bit 7~0 When word 16 bit 3:2 is "01", after power on reset: This word bit 7~0 will be loaded to port 0 Reg. 67H bit 7~0 This word bit 15~8 will be loaded to port 0 Reg. 6DH bit 7~0 When word 16 bit 3:2 is "01", after power on reset: This word bit 7~0 will be loaded to port 1 Reg. 61H bit 7~0 This word bit 15~8 will be loaded to port 1 Reg. 66H bit 7~0 When word 16 bit 3:2 is "01", after power on reset: This word bit 7~0 will be loaded to port 1 Reg. 67H bit 7~0 This word bit 15~8 will be loaded to port 1 Reg. 6DH bit 7~0 When word 16 bit 3:2 is "01", after power on reset: This word bit 7~0 will be loaded to port 2 Reg. 61H bit 7~0 This word bit 15~8 will be loaded to port 2 Reg. 66H bit 7~0 When word 16 bit 3:2 is "01", after power on reset: This word bit 7~0 will be loaded to port 2 Reg. 67H bit 7~0 This word bit 15~8 will be loaded to port 2 Reg. 6DH bit 7~0 Reserved When word 16 bit 5:4 is "01", after power on reset: This word bit 7~0 will be loaded to port 0 Reg. 6EH bit 7~0 This word bit 15~8 will be loaded to port 0 Reg. 6FH bit 7~0 When word 16 bit 5:4 is "01", after power on reset: This word bit 7~0 will be loaded to port 1 Reg. 6EH bit 7~0 This word bit 15~8 will be loaded to port 1 Reg. 6FH bit 7~0 When word 16 bit 5:4 is "01", after power on reset: Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 Switch Control 1 17 Switch Control 2 18 Port 0 Control 1 19 Port 0 Control 2 20 Port 1 Control 1 21 Port 1 Control 2 22 Port 2 Control 1 23 Port 2 Control 2 24 RESERVED Port 0 VLAN Tag 25-26 27 Port 1 VLAN Tag 28 Port 2 VLAN Tag 28 29 DM8203 2-port switch with MII / RMII Interface This word bit 7~0 will be loaded to port 2 Reg. 6EH bit 7~0 This word bit 15~8 will be loaded to port 2 Reg. 6FH bit 7~0 Reserved When word 16 bit 7:6 is "01", after power on reset: This word bit 7~0 will be loaded to Reg. D0H bit 7~0 This word bit 15~8 will be loaded to Reg. D1H bit 7~0 When word 16 bit 9:8 is "01", after power on reset: This word bit 7~0 will be loaded to Reg. B0H bit 7~0 This word bit 15~8 will be loaded to Reg. B1H bit 7~0 When word 16 bit 9:8 is "01", after power on reset: This word bit 7~0 will be loaded to Reg. B2H bit 7~0 This word bit 15~8 will be loaded to Reg. B3H bit 7~0 When word 16 bit 9:8 is "01", after power on reset: This word bit 7~0 will be loaded to Reg. B4H bit 7~0 This word bit 15~8 will be loaded to Reg. B5H bit 7~0 When word 16 bit 9:8 is "01", after power on reset: This word bit 7~0 will be loaded to Reg. B6H bit 7~0 This word bit 15~8 will be loaded to Reg. B7H bit 7~0 When word 16 bit 9:8 is "01", after power on reset: This word bit 7~0 will be loaded to Reg. B8H bit 7~0 This word bit 15~8 will be loaded to Reg. B9H bit 7~0 When word 16 bit 9:8 is "01", after power on reset: This word bit 7~0 will be loaded to Reg. BAH bit 7~0 This word bit 15~8 will be loaded to Reg. BBH bit 7~0 When word 16 bit 9:8 is "01", after power on reset: This word bit 7~0 will be loaded to Reg. BCH bit 7~0 This word bit 15~8 will be loaded to Reg. BDH bit 7~0 When word 16 bit 9:8 is "01", after power on reset: This word bit 7~0 will be loaded to Reg. BEH bit 7~0 This word bit 15~8 will be loaded to Reg. BFH bit 7~0 When word 16 bit 11:10 is "01", after power on reset: This word bit 7~0 will be loaded to Reg. C0H bit 7~0 This word bit 15~8 will be loaded to Reg. C1H bit 7~0 When word 16 bit 11:10 is "01", after power on reset: This word bit 7~0 will be loaded to Reg. C2H bit 7~0 This word bit 15~8 will be loaded to Reg. C3H bit 7~0 When word 16 bit 11:10 is "01", after power on reset: This word bit 7~0 will be loaded to Reg. C4H bit 7~0 This word bit 15~8 will be loaded to Reg. C5H bit 7~0 When word 16 bit 11:10 is "01", after power on reset: This word bit 7~0 will be loaded to Reg. C6H bit 7~0 This word bit 15~8 will be loaded to Reg. C7H bit 7~0 When word 16 bit 11:10 is "01", after power on reset: This word bit 7~0 will be loaded to Reg. C8H bit 7~0 This word bit 15~8 will be loaded to Reg. C9H bit 7~0 When word 16 bit 11:10 is "01", after power on reset: This word bit 7~0 will be loaded to Reg. CAH bit 7~0 This word bit 15~8 will be loaded to Reg. CBH bit 7~0 When word 16 bit 11:10 is "01", after power on reset: 29 RESERVED VLAN Priority Map 30 31 Port VLAN Group 0,1 Port VLAN Group 2,3 Port VLAN Group 4,5 Port VLAN Group 6,7 Port VLAN Group 8,9 Port VLAN Group 10,11 Port VLAN Group 12,13 Port VLAN Group 14,15 ToS Priority Map 0 32 33 34 35 36 37 38 39 40 ToS Priority Map 1 41 ToS Priority Map 2 42 ToS Priority Map 3 43 ToS Priority Map 4 44 ToS Priority Map 5 45 ToS Priority Map 6 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 46 DM8203 2-port switch with MII / RMII Interface This word bit 7~0 will be loaded to Reg. CCH bit 7~0 This word bit 15~8 will be loaded to Reg. CDH bit 7~0 When word 16 bit 11:10 is "01", after power on reset: This word bit 7~0 will be loaded to Reg. CEH bit 7~0 This word bit 15~8 will be loaded to Reg. CFH bit 7~0 ToS Priority Map 7 47 30 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 8. PHY Registers MII Register Description ADD Name 15 00H CONTR Reset OL 0 01H STATUS T4 Cap. 0 02H PHYID1 0 03H PHYID2 1 04H Auto-Neg. Next Advertise Page 05H Link Part. LP Ability Next Page 06H Auto-Neg. Expansio n 10H Specifie BP d 4B5B Config. 11H Specifie 100 FDX d Conf/Stat 12H 10T Rsvd Conf/Stat 13H PWDOR 14 Loop back 0 TX FDX Cap. 1 0 0 FLP Rcv Ack LP Ack 13 12 11 Speed Auto-N Power select Enable Down 1 1 0 TX HDX 10 FDX 10 HDX Cap. Cap. Cap. 1 1 1 0 0 0 1 1 1 Remote Fault LP RF Reserved Reserved 10 Isolate 0 9 8 Restart Full Auto-N Duplex 0 1 Reserved 7 Coll. Test 0 6 5 4 3 Reserved 2 1 0 0 0 FC Adv LP FC Reserved Pream. Auto-N Supr. Compl. 0000 1 0 0 1 1 0 0 Model No. 01011 T4 TX FDX TX HDX 10 FDX 10 HDX Adv Adv Adv Adv Adv LP LP LP LP LP T4 TX FDX TX HDX 10 FDX 10 HDX Remote Fault 0 0 000_0000 Auto-N Link Jabber Cap. Status Detect 1 0 0 0 0 0 Version No. 0000 Advertised Protocol Selector Field Link Partner Protocol Selector Field Extd Cap. 1 1 Pardet Fault LP Next Pg Able Next Pg Able Pream. Supr. New Pg LP AutoN Rcv Cap. Sleep mode Reserved BP SCR 100 HDX LP Enable BP BP_ADP Reserve ALIGN OK dr 10 FDX HBE Enable TX Reserve Reserve Force Reserve Reserve RPDCTR Reset d d 100LNK d d -EN St. Mch PHY ADDR [4:0] Reserved PD10DR PD100l V PDchip PDcrm PDaeq PDdrv 10 HDX Reserve Reverse Reverse d d d SQUE Enable Reserved JAB Enable Reserve d Auto-N. Monitor Bit [3:0] Polarity Reverse PDecli PDeclo PD10 14H Specified TSTSE1 TSTSE FORCE_ FORCE_ PREA TX10M NWAY_ Reserved MDIX_C AutoNeg Mdix_fix Mdix_do MonSel1 MonSel0 Reserve PD_valu config 2 TXSD FEF NTL _dlpbk Value wn d e MBLE _PWR PWR X 16H RCVER 17H DIS_conn ect Reversed Receiver Error Counter Disconnect_counter 1DH PSCR Reversed PREA AMPLIT TX_PW MBLEX UDE R Reversed Key to Default In the register description that follows, the default column takes the form: Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 31 DM8203 2-port switch with MII / RMII Interface 8.1 Basic Mode Control Register (BMCR) - 00H Bit 15 Bit Name Reset Default Description 0, RW/SC Reset 1=Software reset 0=Normal operation This bit sets the status and controls the PHY registers to their default states. This bit, which is self-clearing, will keep returning a value of one until the reset process is completed 0, RW Loopback Loop-back control register 1 = Loop-back enabled 0 = Normal operation When in 100Mbps operation mode, setting this bit may cause the descrambler to lose synchronization and produce a 720ms "dead time" before any valid data appears at the MII receive outputs 1, RW Speed Select 1 = 100Mbps 0 = 10Mbps Link speed may be selected either by this bit or by auto-negotiation. When auto-negotiation is enabled and bit 12 is set, this bit will return auto-negotiation selected medium type 1, RW Auto-negotiation Enable 1 = Auto-negotiation is enabled, bit 8 and 13 will be in auto-negotiation status 0, RW Power Down While in the power-down state, the PHY should respond to management transactions. During the transition to power-down state and while in the power-down state, the PHY should not generate spurious signals on the MII 1=Power down 0=Normal operation 0,RW Isolate Force to 0 in application. 0,RW/SC Restart Auto-negotiation 1 = Restart auto-negotiation. Re-initiates the auto-negotiation process. When auto-negotiation is disabled (bit 12 of this register cleared), this bit has no function and it should be cleared. This bit is self-clearing and it will keep returning to a value of 1 until auto-negotiation is initiated by the DM8203. The operation of the auto-negotiation process will not be affected by the management entity that clears this bit 0 = Normal operation 1,RW Duplex Mode 1 = Full duplex operation. Duplex selection is allowed when Auto-negotiation is disabled (bit 12 of this register is cleared). With auto-negotiation enabled, this bit reflects the duplex capability selected by auto-negotiation 0 = Normal operation Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 14 Loopback 13 Speed selection 12 Auto-negotiation enable Power down 11 10 9 Isolate Restart Auto-negotiation 8 Duplex mode 32 DM8203 2-port switch with MII / RMII Interface 7 Collision test 0,RW Collision Test 1 = Collision test enabled. When set, this bit will cause the COL signal to be asserted in response to the assertion of TX_EN in internal MII interface. 0 = Normal operation Reserved Read as 0, ignore on write 6-0 Reserved 0,RO 8.2 Basic Mode Status Register (BMSR) - 01H Bit 15 Bit Name 100BASE-T4 Default 0,RO/P Description 100BASE-T4 Capable 1 = DM8203 is able to perform in 100BASE-T4 mode 0 = DM8203 is not able to perform in 100BASE-T4 mode 100BASE-TX Full Duplex Capable 1 = DM8203 is able to perform 100BASE-TX in full duplex mode 0 = DM8203 is not able to perform 100BASE-TX in full duplex mode 100BASE-TX Half Duplex Capable 1 = DM8203 is able to perform 100BASE-TX in half duplex mode 0 = DM8203 is not able to perform 100BASE-TX in half duplex mode 10BASE-T Full Duplex Capable 1 = DM8203 is able to perform 10BASE-T in full duplex mode 0 = DM8203 is not able to perform 10BASE-TX in full duplex mode 10BASE-T Half Duplex Capable 1 = DM8203 is able to perform 10BASE-T in half duplex mode 0 = DM8203 is not able to perform 10BASE-T in half duplex mode Reserved Read as 0, ignore on write MII Frame Preamble Suppression 1 = PHY will accept management frames with preamble suppressed 0 = PHY will not accept management frames with preamble suppressed Auto-negotiation Complete 1 = Auto-negotiation process completed 0 = Auto-negotiation process not completed Remote Fault 1 = Remote fault condition detected (cleared on read or by a chip reset). Fault criteria and detection method is DM8203 implementation specific. This bit will set after the RF bit in the ANLPAR (bit 13, register address 05) is set 0 = No remote fault condition detected Auto Configuration Ability 1 = DM8203 is able to perform auto-negotiation 0 = DM8203 is not able to perform auto-negotiation Link Status 1 = Valid link is established (for either 10Mbps or 100Mbps operation) 0 = Link is not established 33 14 100BASE-TX full-duplex 100BASE-TX half-duplex 1,RO/P 13 1,RO/P 12 10BASE-T full-duplex 10BASE-T half-duplex Reserved MF preamble suppression 1,RO/P 11 1,RO/P 10-7 6 0,RO 1,RO 5 Auto-negotiation Complete Remote fault 0,RO 4 0, RO 3 Auto-negotiation ability Link status 1,RO/P 2 0,RO Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface The link status bit is implemented with a latching function, so that the occurrence of a link failure condition causes the link status bit to be cleared and remain cleared until it is read via the management interface Jabber Detect 1 = Jabber condition detected 0 = No jabber This bit is implemented with a latching function. Jabber conditions will set this bit unless it is cleared by a read to this register through a management interface or a DM8203 reset. This bit works only in 10Mbps mode Extended Capability 1 = Extended register capable 0 = Basic register capable only 1 Jabber detect 0, RO 0 Extended capability 1,RO/P 8.3 PHY ID Identifier Register #1 (PHYID1) - 02H The PHY Identifier Registers #1 and #2 work together in a single identifier of the DM8203. The Identifier consists of a concatenation of the Organizationally Unique Identifier (OUI), a vendor's model number, and a model revision number. DAVICOM Semiconductor's IEEE assigned OUI is 00606E. Bit 15-0 Bit Name OUI_MSB Default <0181h> Description OUI Most Significant Bits This register stores bit 3 to 18 of the OUI (00606E) to bit 15 to 0 of this register respectively. The most significant two bits of the OUI are ignored (the IEEE standard refers to these as bit 1 and 2) 8.4 PHY ID Identifier Register #2 (PHYID2) - 03H Bit 15-10 Bit Name OUI_LSB Default <101110>, RO/P <001011>, RO/P <0000>, RO/P Description OUI Least Significant Bits Bit 19 to 24 of the OUI (00606E) are mapped to bit 15 to 10 of this register respectively Vendor Model Number Five bits of vendor model number mapped to bit 9 to 4 (most significant bit to bit 9) Model Revision Number Five bits of vendor model revision number mapped to bit 3 to 0 (most significant bit to bit 4) 9-4 VNDR_MDL 3-0 MDL_REV 34 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 8.5 Auto-negotiation Advertisement Register (ANAR) - 04H This register contains the advertised abilities of this DM8203 device as they will be transmitted to its link partner during Auto-negotiation. Bit 15 Bit Name NP Description Next page Indication 0 = No next page available 1 = Next page available The DM8203 has no next page, so this bit is permanently set to 0 0,RO Acknowledge 1 = Link partner ability data reception acknowledged 0 = Not acknowledged The DM8203's auto-negotiation state machine will automatically control this bit in the outgoing FLP bursts and set it at the appropriate time during the auto-negotiation process. Software should not attempt to write to this bit. 0, RW Remote Fault 1 = Local device senses a fault condition 0 = No fault detected X, RW Reserved Write as 0, ignore on read 0, RW Flow Control Support 1 = Controller chip supports flow control ability 0 = Controller chip doesn't support flow control ability 0, RO/P 100BASE-T4 Support 1 = 100BASE-T4 is supported by the local device 0 = 100BASE-T4 is not supported The DM8203 does not support 100BASE-T4 so this bit is permanently set to 0 1, RW 100BASE-TX Full Duplex Support 1 = 100BASE-TX full duplex is supported by the local device 0 = 100BASE-TX full duplex is not supported 1, RW 100BASE-TX Support 1 = 100BASE-TX half duplex is supported by the local device 0 = 100BASE-TX half duplex is not supported 1, RW 10BASE-T Full Duplex Support 1 = 10BASE-T full duplex is supported by the local device 0 = 10BASE-T full duplex is not supported 1, RW 10BASE-T Support 1 = 10BASE-T half duplex is supported by the local device 0 = 10BASE-T half duplex is not supported <00001>, RW Protocol Selection Bits These bits contain the binary encoded protocol selector supported by this node <00001> indicates that this device supports IEEE 802.3 CSMA/CD Default 0,RO/P 14 ACK 13 RF 12-11 10 Reserved FCS 9 T4 8 TX_FDX 7 TX_HDX 6 10_FDX 5 10_HDX 4-0 Selector Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 35 DM8203 2-port switch with MII / RMII Interface 8.6 Auto-negotiation Link Partner Ability Register (ANLPAR) - 05H This register contains the advertised abilities of the link partner when received during Auto-negotiation. Bit 15 Bit Name NP Description Next Page Indication 0 = Link partner, no next page available 1 = Link partner, next page available 0, RO Acknowledge 1 = Link partner ability data reception acknowledged 0 = Not acknowledged The DM8203's auto-negotiation state machine will automatically control this bit from the incoming FLP bursts. Software should not attempt to write to this bit 0, RO Remote Fault 1 = Remote fault indicated by link partner 0 = No remote fault indicated by link partner 0, RO Reserved Read as 0, ignore on write 0, RO Flow Control Support 1 = Controller chip supports flow control ability by link partner 0 = Controller chip doesn't support flow control ability by link partner 0, RO 100BASE-T4 Support 1 = 100BASE-T4 is supported by the link partner 0 = 100BASE-T4 is not supported by the link partner 0, RO 100BASE-TX Full Duplex Support 1 = 100BASE-TX full duplex is supported by the link partner 0 = 100BASE-TX full duplex is not supported by the link partner 0, RO 100BASE-TX Support 1 = 100BASE-TX half duplex is supported by the link partner 0 = 100BASE-TX half duplex is not supported by the link partner 0, RO 10BASE-T Full Duplex Support 1 = 10BASE-T full duplex is supported by the link partner 0 = 10BASE-T full duplex is not supported by the link partner 0, RO 10BASE-T Support 1 = 10BASE-T half duplex is supported by the link partner 0 = 10BASE-T half duplex is not supported by the link partner <00000>, RO Protocol Selection Bits Link partner's binary encoded protocol selector Default 0, RO 14 ACK 13 RF 12-11 10 Reserved FCS 9 T4 8 TX_FDX 7 TX_HDX 6 10_FDX 5 10_HDX 4-0 Selector 36 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 8.7 Auto-negotiation Expansion Register (ANER) - 06H Bit 15-5 4 Bit Name Reserved PDF Default 0, RO 0, RO/LH Description Reserved Read as 0, ignore on write Local Device Parallel Detection Fault PDF = 1: A fault detected via parallel detection function. PDF = 0: No fault detected via parallel detection function Link Partner Next Page Able LP_NP_ABLE = 1: Link partner, next page available LP_NP_ABLE = 0: Link partner, no next page Local Device Next Page Able NP_ABLE = 1: DM8203, next page available NP_ABLE = 0: DM8203, no next page DM8203 does not support this function, so this bit is always 0 New Page Received A new link code word page received. This bit will be automatically cleared when the register (register 6) is read by management Link Partner Auto-negotiation Able A "1" in this bit indicates that the link partner supports Auto-negotiation 3 LP_NP_ABLE 0, RO 2 NP_ABLE 0,RO/P 1 PAGE_RX 0, RO 0 LP_AN_ABLE 0, RO 8.8 DAVICOM Specified Configuration Register (DSCR) - 10H Bit 15 Bit Name BP_4B5B Default 0,RW Description Bypass 4B5B Encoding and 5B4B Decoding 1 = 4B5B encoder and 5B4B decoder function bypassed 0 = Normal 4B5B and 5B4B operation Bypass Scrambler/Descrambler Function 1 = Scrambler and descrambler function bypassed 0 = Normal scrambler and descrambler operation Bypass Symbol Alignment Function 1 = Receive functions (descrambler, symbol alignment and symbol decoding functions) bypassed. Transmit functions (symbol encoder and scrambler) bypassed 0 = Normal operation BYPASS ADPOK Force signal detector (SD) active. This register is for debug only, not release to customer 1=Forced SD is OK, 0=Normal operation Reserved Force to 0 in application 100BASE-TX Mode Control 1 = 100BASE-TX operation 0 = 100BASE-FX operation Reserved 37 14 BP_SCR 0, RW 13 BP_ALIGN 0, RW 12 BP_ADPOK 0, RW 11 10 Reserved TX RW 1, RW 9 Reserved 0, RO Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 8 7 Reserved F_LINK_100 0, RW 0, RW Reserved Force to 0 in application. Force Good Link in 100Mbps 0 = Normal 100Mbps operation 1 = Force 100Mbps good link status This bit is useful for diagnostic purposes Reserved Force to 0 in application. Reserved Force to 0 in application. Reduced Power Down Control Enable This bit is used to enable automatic reduced power down 0 = Disable automatic reduced power down 1 = Enable automatic reduced power down Reset State Machine When writes 1 to this bit, all state machines of PHY will be reset. This bit is self-clear after reset is completed MF Preamble Suppression Control MII frame preamble suppression control bit 1 = MF preamble suppression bit on 0 = MF preamble suppression bit off Sleep Mode Writing a 1 to this bit will cause PHY entering the Sleep mode and power down all circuit except oscillator and clock generator circuit. When waking up from Sleep mode (write this bit to 0), the configuration will go back to the state before sleep; but the state machine will be reset Reserved Force to 0 in application. 6 5 4 Reserved Reserved RPDCTR-EN 0, RW 0, RW 1, RW 3 SMRST 0, RW 2 MFPSC 1, RW 1 SLEEP 0, RW 0 Reserved 0, RW 38 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 8.9 DAVICOM Specified Configuration and Status Register (DSCSR) - 11H Bit 15 Bit Name 100FDX Default 1, RO Description 100M Full Duplex Operation Mode After auto-negotiation is completed, results will be written to this bit. If this bit is 1, it means the operation 1 mode is a 100M full duplex mode. The software can read bit [15:12] to see which mode is selected after auto-negotiation. This bit is invalid when it is not in the auto-negotiation mode 100M Half Duplex Operation Mode After auto-negotiation is completed, results will be written to this bit. If this bit is 1, it means the operation 1 mode is a 100M half duplex mode. The software can read bit [15:12] to see which mode is selected after auto-negotiation. This bit is invalid when it is not in the auto-negotiation mode 10M Full Duplex Operation Mode After auto-negotiation is completed, results will be written to this bit. If this bit is 1, it means the operation 1 mode is a 10M Full Duplex mode. The software can read bit [15:12] to see which mode is selected after auto-negotiation. This bit is invalid when it is not in the auto-negotiation mode 10M Half Duplex Operation Mode After auto-negotiation is completed, results will be written to this bit. If this bit is 1, it means the operation 1 mode is a 10M half duplex mode. The software can read bit [15:12] to see which mode is selected after auto-negotiation. This bit is invalid when it is not in the auto-negotiation mode Reserved Read as 0, ignore on write Reserved Reserved PHY Address Bit 4:0 The first PHY address bit transmitted or received is the MSB of the address (bit 4). A station management entity connected to multiple PHY entities must know the appropriate address of each PHY Auto-negotiation Monitor Bits These bits are for debug only. The auto-negotiation status will be written to these bits. B3 B2 B1 B0 0 0 0 0 In IDLE state 0 0 0 1 Ability match 0 0 1 0 Acknowledge match 0 0 1 1 Acknowledge match fail 0 1 0 0 Consistency match 0 1 0 1 Consistency match fail 0 1 1 0 Parallel detects signal link ready 0 1 1 1 Parallel detects signal link ready fail 1 0 0 0 Auto-negotiation completed successfully 39 14 100HDX 1, RO 13 10FDX 1, RO 12 10HDX 1, RO 11 10 9 8-4 Reserved Reserved Reserved PHYADR[4: 0] 0, RO 0,RW 0,RW 0 or 1, RW 3-0 ANMB[3:0] 0, RO Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 8.10 10BASE-T Configuration/Status (10BTCSR) - 12H Bit 15 14 Bit Name Reserved LP_EN Default 0, RO 1, RW Description Reserved Read as 0, ignore on write Link Pulse Enable 1 = Transmission of link pulses enabled 0 = Link pulses disabled, good link condition forced This bit is valid only in 10Mbps operation Heartbeat Enable 1 = Heartbeat function enabled 0 = Heartbeat function disabled When the DM8203 is configured for full duplex operation, this bit will be ignored (the collision/heartbeat function is invalid in full duplex mode) Squelch Enable 1 = Normal squelch 0 = Low squelch Jabber Enable Enables or disables the Jabber function when the DM8203 is in 10BASE-T full duplex or 10BASE-T transceiver Loopback mode 1 = Jabber function enabled 0 = Jabber function disabled 10Mbps Serial Mode (only valid in PHY test mode) Force to 0, in application. Reserved Read as 0, ignore on write Polarity Reversed When this bit is set to 1, it indicates that the 10Mbps cable polarity is reversed. This bit is automatically set and cleared by 10BASE-T module 13 HBE 1,RW 12 SQUELCH 1, RW 11 JABEN 1, RW 10 9-1 0 SERIAL Reserved POLR 0, RW 0, RO 0, RO 8.11 Power down Control Register (PWDOR) - 13H Description Reserved Read as 0, ignore on write 8 PD10DRV 0, RW Vendor power down control test 7 PD100DL 0, RW Vendor power down control test 6 PDchip 0, RW Vendor power down control test 5 PDcrm 0, RW Vendor power down control test 4 PDaeq 0, RW Vendor power down control test 3 PDdrv 0, RW Vendor power down control test 2 PDedi 0, RW Vendor power down control test 1 PDedo 0, RW Vendor power down control test 0 PD10 0, RW Vendor power down control test * When selected, the power down value is control by Register 14H Bit 15-9 Bit Name Reserved Default 0, RO 40 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 8.12 (Specified config) Register - 14H Bit Bit Name Default 15 TSTSE1 0,RW 14 TSTSE2 0,RW 13 FORCE_TXSD 0,RW Description Vendor test select 1 control Vendor test select 2 control Force Signal Detect 1: force SD signal OK in 100BASE-TX mode 0: normal SD signal. Vendor test select control Preamble Saving Control 0: when bit 10 is set, the 10BASE-T transmit preamble count is reduced. When bit 11 of register 1DH is set, 12-bit preamble is reduced; otherwise 22-bit preamble is reduced. 1: transmit preamble bit count is normal in 10BASE-T mode 10BASE-T mode Transmit Power Saving Control 1: enable transmit power saving in 10BASE-T mode 0: disable transmit power saving in 10BASE-T mode Auto-negotiation Power Saving Control 1: disable power saving during auto-negotiation period 0: enable power saving during auto-negotiation period Reserved 12 11 FORCE_FEF PREAMBLEX 0,RW 0,RW 10 TX10M_PWR 1,RW 9 NWAY_PWR 0,RW 8 7 Reserved MDIX_CNTL 0, RO 6 5 4 3 2 1 0 Read as 0, ignore on write MDI/MDIX,RO The polarity of MDI/MDIX value 1: MDIX mode 0: MDI mode AutoNeg_dpbk 0,RW Auto-negotiation Loopback 1: test internal digital auto-negotiation Loopback 0: normal. Mdix_fix Value 0, RW MDIX_CNTL force value: When Mdix_down = 1, MDIX_CNTL value depend on the register value. Mdix_down 0,RW MDIX Down Manual force MDI/MDIX. 0: Enable HP Auto-MDIX 1: Disable HP Auto-MDIX , MDIX_CNTL value depend on Reg.14H.bit5 MonSel1 0,RW Vendor monitor select 1 MonSel0 0,RW Vendor monitor select 0 Reserved 0,RW Reserved Force to 0, in application. PD_value 0,RW Power down control value Decision the value of each field Reg.13H. 1: power down 0: normal Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 41 DM8203 2-port switch with MII / RMII Interface 8.13 DAVICOM Specified Receive Error Counter Register (RECR) - 16H Bit 15-0 Bit Name Rcv_ Err_ Cnt Default 0, RO Description Receive Error Counter Receive error counter that increments upon detection of RXER. Clean by read this register. 8.14 DAVICOM Specified Disconnect Counter Register (DISCR) - 17H Bit 15-8 7-0 Bit Name Reserved Disconnect Counter Default 0, RO 0, RO Description Reserved Disconnect Counter that increment upon detection of disconnection. Clean by read this register. 8.15 Power Saving Control Register (PSCR) - 1DH Bit 15-12 11 Bit Name RESERVED PREAMBLEX Default 0,RO 0,RW Description RESERVED Preamble Saving Control when both bit 10and 11 of register 14H are set, the 10BASE-T transmit preamble count is reduced. 1: 12-bit preamble is reduced. 0: 22-bit preamble is reduced. Transmit Amplitude Control Disabled 1: when cable is unconnected with link partner, the TX amplitude is reduced for power saving. 0: disable Transmit amplitude reduce function Transmit Power Saving Control Disabled 1: when cable is unconnected with link partner, the driving current of transmit is reduced for power saving. 0: disable transmit driving power saving function RESERVED 10 AMPLITUDE 0,RW 9 TX_PWR 0.RW 8-0 RESERVED 0,RO 42 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 9. Functional Description 9.1 Serial Management Interface Host SMI SMI_CK SMI_DIO (SMI device address = 0~3) MDC MDIO Host / MAC Only one host is allowed to acccess the SMI_CK, SMI_DIO DM8203 MDC MDIO MII SMI MDC MDIO Port2 PHY (PHY Address = 2) External PHY can be accessed via the MDC, MDIO Host SMI - Read Frame Structure SMI_CK SMI_DIO Read 32 "1"s Idle Preamble 0 SFD 1 1 0 A1 A0 R7 R6 R5 R0 // Z 0 D15 D14 Data Read D1 D0 Idle SMI_R_8203 // Op Code Device Address Write Register Address Turn Around Host SMI - Write Frame Structure SMI_CK SMI_DIO Write 32 "1"s Idle Preamble 0 SFD 1 0 1 A1 A0 R7 R6 R5 R0 1 0 D15 D14 Data D1 D0 Idle Op Code Device Address Register Address Write Turn Around SMI_W_8203 DM8203 supports two type of serial management interface (SMI), Host SMI and MII SMI. The application of SMI illustrated as below. 1. The Host SMI consists of two pins, one is SMI_CK and another is SMI_DIO. User can access DM8203's EEPROM, PHY registers, MIB counters and Configuration registers through Host SMI. The format is following. The Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 pin (TXD2_0 & TXD2_1). The 43 DM8203 2-port switch with MII / RMII Interface 9.2 Switch function: 9.2.1 Address Learning The DM8203 has a self-learning mechanism for learning the MAC addresses of incoming packets in real time. DM8203 stores MAC addresses, port number and time stamp information in the Hash-based Address Table. It can learn up to 1K unicast address entry. The switch engine updates address table with new entry if incoming packet's Source Address (SA) does not exist and incoming packet is valid (non-error and legal length). Besides, DM8203 has an option to disable address learning for individual port. This feature can be set by bit 0 of register 65h 9.2.2 Address Aging The time stamp information of address table is used in the aging process. The switch engine updates time stamp whenever the corresponding SA receives. The switch engine would delete the entry if its time stamp is not updated for a period of time. The period can be programmed or disabled through bit 0 & 1 of register 52h. 9.2.3 Packet Forwarding The DM8203 forwards the incoming packet according to following decision: (1). If DA is Multicast/Broadcast, the packet is forwarded to all ports, except to the port on which the packet was received. (2). Switch engine would look up address table based on DA when incoming packets is UNICAST. If the DA was not found in address table, the packet is treated as a multicast packet and forward to other ports. If the DA was found and its destination port number is different to source port number, the packet is forward to destination port. (3). Switch engine also look up VLAN, Port Monitor setting and other forwarding constraints for the forwarding decision, more detail will discuss in later sections. The DM8203 will filter incoming packets under following conditions: (1). Error packets, including CRC errors, alignment errors, illegal size errors. (2). PAUSE packets. 44 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 (3). If incoming packet is UNICAST and its destination port number is equal to source port number. 9.2.4 Inter-Packet Gap (IPG) IPG is the idle time between any two valid packets at the same port. The typical number is 96 bits time. In other word, the value is 9.6u sec for 10Mbps and 960n sec for 100Mbps. 9.2.5 Back-off Algorithm The DM8203 implements the binary exponential back-off algorithm in half-duplex mode compliant to IEEE standard 802.3. 9.2.6 Late Collision Late Collision is a type of collision. If a collision error occurs after the first 512 bit times of data are transmitted, the packet is dropped. 9.2.7 Full Duplex Flow Control The DM8203 supports IEEE standard 802.3x flow control frames on both transmit and receive sides. On the receive side, The DM8203 will defer transmitting next normal frames, if it receives a pause frame from link partner. On the transmit side, The DM8203 issues pause frame with maximum pause time when internal resources such as received buffers, transmit queue and transmit descriptor ring are unavailable. Once resources are available, The DM8203 sends out a pause frame with zero pause time allows traffic to resume immediately. 9.2.8 Half Duplex Flow Control The DM8203 supports half-duplex backpressure. The inducement is the same as full duplex mode. When flow control is required, the DM8203 sends jam pattern and results in a collision. The flow control ability can be set in bit 4 of register 61h. DM8203 2-port switch with MII / RMII Interface 9.2.9 Partition Mode The DM8203 provides a partition mode for each port, see bit 6 of register 61h. The port enters partition mode when more than 64 consecutive collisions are occurred. In partition mode the port continuous to transmit but it will not receive. The port returned to normal operation mode when a good packet is seen on the wire. The detail description of partition mode represent following: (1). Entering Partition State A port will enter the Partition State when either of the following conditions occurs: The port detects a collision on every one of 64 consecutive re-transmit attempts to the same packet. The port detects a single collision which occurs for more than 512 bit times. Transmit defer timer time out, which indicates the transmitting packet is deferred to long. (2). While in Partition state: The port will continue to transmit its pending packet, regardless of the collision detection, and will not allow the usual Back-off Algorithm. Additional packets pending for transmission will be transmitted, while ignoring the internal collision indication. This frees up the ports transmit buffers which would otherwise be filled up at the expense of other ports buffers. The assumption is that the partition is signifying a system failure situation (bad connection/cable/station), thus dropping packets is a small price to pay vs. the cost of halting the switch due to a buffer full condition. (3). Exiting from Partition State The Port exits from Partition State, following the end of a successful packet transmission. A successful packet transmission is defined as no collisions were detected on the first 512 bits of the transmission. 9.2.10 Broadcast Storm Filtering The DM8203 has an option to limit the traffic of broadcast or multicast packets, to protect the switch from lower bandwidth availability. There are two types of broadcast storm control, one is throttling broadcast packet only, the other includes multicast. This feature can be set through bit 1 of register 61h. The broadcast storm threshold can be Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 programmed by EEPROM or register 67h, the default setting is no broadcast storm protecting. 9.2.11 Bandwidth Control The DM8203 supports two types of bandwidth control for each port. One is the ingress and egress bandwidth rate can be controlled separately, the other is combined together, this function can be set through bit 3 of register 61h. The bandwidth control is disabled by default. To separate bandwidth control mode, the threshold rate is defined in register 66h. For combined mode, it is defined in register 67h. The behavior of bandwidth control as below: (1).For the ingress control, if flow control function is enabled, Pause or Jam packet will be transmitted. The ingress packets will be dropped if flow control is disabled. (2).For the egress control, the egress port will not transmit any packets. On the other hand, the ingress bandwidth of source port will be throttled that prevent packets from forwarding. (3).In combined mode, if the sum of ingress and egress bandwidth over threshold, the bandwidth will be throttled. 9.2.12 Port Monitoring Support The DM8203 supports "Port Monitoring" function on per port base, detail as below: (1). Sniffer Port and Monitor Port There is only one port can be selected as "sniffer port" by register 52h, multiple ports can be set as "receive monitor port" or "transmit monitor port" in per-port register 65h. (2).Receive monitor All packets received on the "receive monitor port" are send a copy to "sniffer port". For example, port 0 is set as "receive monitor port" and port 2 is selected as a "sniffer port". If a packet is received form port 0 and predestined to port 1 after forwarding decision, the DM8203 will forward it to port 1 and port 2 in the end. (3).Transmit monitor All packets transmitted on the "transmit monitor port" are send a copy to "sniffer port". For example, port 1 is set as "transmit monitor port" and port 2 is selected as "sniffer port". If a packet is received from port 0 and predestined to port 1 after forwarding decision, the DM8203 will forward it to port 1 and port 45 DM8203 2-port switch with MII / RMII Interface 2 in the end. (4).Exception The DM8203 has an optional setting that broadcast/multicast packets are not monitored (see bit 4 of register 65h). It's useful to avoid unnecessary bandwidth. 9.2.13 VLAN Support 9.2.13.1 Port-Based VLAN The DM8203 supports port-based VLAN as default, up to 16 groups. Each port has a default VID called PVID (Port VID, see register 6Fh). The DM8203 used LSB 4-bytes of PVID as index and mapped to register B0h~BFh, to define the VLAN groups. For instance, we intend to partition DM8203's ports into three groups. Port 0 and port 1 in group A, port 1 and port 2 in group B, finally, port 2 and port 0 in group C. In this case, the setting as below: (1). Set PVID of Port 0 to 0x01h. (2). Set PVID of Port 1 to 0x02h. (3). Set PVID of Port 2 to 0x03h. (4). Set register B1h to 0x06h. (5). Set register B2h to 0x05h. (6). Set register B3h to 0x03h. 9.2.13.2 802.1Q-Based VLAN Regarding IEEE 802.1Q standard, Tag-based VLAN uses an extra tag to identify the VLAN membership of a frame across VLAN-aware switch/router. A tagged frame is four bytes longer than an untagged frame and contains two bytes of TPID (Tag Protocol Identifier) and two bytes of TCI (Tag Control Information). Dest. Src. Length/Type Data Standard frame Dest. Src. TPID 0x8100 2 bytes TCI Length / Type Data Tagged frame Priority 3 bits The DM8203 also supports 16 802.1Q-based VLAN groups, as specified in bit 1 of register 53h. It's obvious that the tagged packets can be assigned to several different VLANs which are determined according to the VID inside the VLAN Tag. Therefore, the operation is similar to port-based VLAN. The DM8203 used LSB 4-bytes VID of received packet with VLAN tag and VLAN Group Mapping Register (B0h~BFh) to configure the VLAN partition. If the destination port of received packet is not same VLAN group with received port, it will be discarded. 9.2.13.3 Tag/Untag 46 CFI 1 bits VID VLAN_9013.vsd 12 bits User can define each port as Tag port or Un-tag port by bit 7 of register 6Dh in 802.1Q-based VLAN mode. The operation of Tag and Un-tag can explain as below conditions: (1). Receive untagged packet and forward to Un-tag port. Received packet will forward to destination port without modification. (2). Receive tagged packet and forward to Un-tag port. The DM8203 will remove the tag from the packet and recalculate CRC before sending it out. (3). Receive untagged packet and forward to Tag port. Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface The DM8203 will insert the PVID tag when an untagged packet enters the port, and recalculate CRC before delivering it. (4). Receive tagged packet and forward to Tag port. Received packet will forward to destination port without modification. 9.2.14 Priority Support The DM8203 supports Quality of Service (QoS) mechanism for multimedia communication such as VoIP and video conferencing. The DM8203 provides three priority classifications: Port-based, 802.1p-based and DiffServ-based priority. See next section for more detail. The DM8203 offers four level queues for transmit on per-port based. The DM8203 provides two packet scheduling algorithms: Weighted Fair Queuing and Strict Priority Queuing. Weighted Fair Queuing (WFQ) based on their priority and queue weight. Queues with larger weights get more service than smaller. This mechanism can get highly efficient bandwidth and smooth the traffic. Strict Priority Queuing (SPQ) based on priority only. The Packet on the highest priority queue is transmitted first. The next highest-priority queue is work until last queue empties, and so on. This feature can be set in bit 5 of register 6Dh. 9.2.14.1 Port-Based Priority Port based priority is the simplest scheme and as default. Each port has a 2-bit priority value as index for splitting ingress packets to the corresponding transmit queue. This value can be set in bit 0 and 1 of register 6Dh. 9.2.14.2 802.1p-Based Priority 802.1p priority can be disabled by bit 2 of register 6Dh, it is enabled by default. The DM8203 extracts 3-bit priority field from received packet with 802.1p VLAN tag, and maps this field against VLAN Priority Map Registers (D0h~D1h) to determine which transmit queue is designated. The VLAN Priority Map is programmable. 9.2.14.3 DiffServ-Based Priority DiffServ based priority uses the most significant 6-bit of the ToS field in standard IPv4 header, and maps this field against ToS Priority Map Registers (C0h~CFh) to determine which transmit queue is designated. The ToS Priority Map is programmable too. In addition, User can only refer to most significant 3-bit of the ToS field optionally, see bit 7 of register 53h. Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 47 DM8203 2-port switch with MII / RMII Interface 9.3 MII Interface 9.3.1 MII data interface The DM8203 port 2 provides a Media Independent Interface (MII) as defined in the IEEE 802.3u standard (Clause 22). The MII consists of a nibble wide receive data bus, a nibble wide transmit data bus, and control signals to facilitate data transfers between the DM8203 port 2 and external device (a PHY or a MAC in reverse MII). * TXD2 (transmit data) is a nibble (4 bits) of data that are driven by the DM8203 synchronously with respect to TXC2. For each TXC2 period, which TXE2 is asserted, TXD2 (3:0) are accepted for transmission by the external device. * TXC2 (transmit clock) from the external device is a continuous clock that provides the timing reference for the transfer of the TXE2, TXD2. The DM8203 can drive 25MHz clock if it is configured to reversed MII mode. * TXE2 (transmit enable) from the DM8203 port 2 MAC indicates that nibbles are being presented on the MII for transmission to the external device. * RXD2 (receive data) is a nibble (4 bits) of data that are sampled by the DM8203 port 2 MAC synchronously with respect to RXC2. For each RXC2 period which RXDV2 is asserted, RXD2 (3:0) are transferred from the external device to the DM8203 port 2 MAC reconciliation sub layer. * RXC2 (receive clock) from external device to the DM8203 port 2 MAC reconciliation sub layer is a continuous clock that provides the timing reference for the transfer of the RXDV2, RXD2, and RXER2 signals. * RXDV2 (receive data valid) input from the external device to indicates that the external device is presenting recovered and decoded nibbles to the DM8203 port 2 MAC reconciliation sub layer. To interpret a receive frame correctly by the reconciliation sub layer, RXDV2 must encompass the frame, starting no later than the Start-of-Frame delimiter and excluding any End-Stream delimiter. * RXER2 (receive error) input from the external device is synchronously with respect to RXC2. RXER2 will be asserted for 1 or more clock periods to indicate to the reconciliation sub layer that an error was detected somewhere in the frame being 48 transmitted from the external device to the DM8203 port 2 MAC. * CRS2 (carrier sense) is asserted by the external device when either the transmit or receive medium is non-idle, and de-asserted by the external device when the transmit and receive medium are idle. The CRS2 can also in output mode when the DM8203 port 2 is configured to reversed MII mode. * COL2 (collision detection) is asserted by the external device, when both the transmit and receive medium is non-idle, and de-asserted by the external device when the either transmit or receive medium are idle. The COL2 can also in output mode when the DM8203 port 2 is configured to reversed MII mode. 9.3.2 MII Serial Management The MII serial management interface consists of a data interface, basic register set in DM8203 port 0 and 1, and a serial management interface to the register set. Through this interface it is possible to control and configure multiple PHY devices, include internal two ports, get status and error information, and determine the type and capabilities of the attached PHY device(s). The DM8203 default is polling 3 ports basic registers 0, 1, 4, and 5 to get the link, duplex, and speed status automatically. Alternatively, the DM8203 can be programmed to read or write any registers of 3 ports by section 6.8~11 CSR B, C, D, and E. The DM8203 management functions correspond to MII specification for IEEE 802.3u-1995 (Clause 22) for registers 0 through 6 with vendor-specific registers 16,17, 18, 21, 22, 23 and 24~27. In read/write operation, the management data frame is 64-bits long and starts with 32 contiguous logic one bits (preamble) synchronization clock cycles on MDC. The Start of Frame Delimiter (SFD) is indicated by a <01> pattern followed by the operation code (OP) :< 10> indicates Read operation and <01> indicates Write operation. For read operation, a 2-bit turnaround (TA) filing between Register Address field and Data field is provided for MDIO to avoid contention. Following the turnaround time, 16-bit data is read from or written onto management registers. Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 9.3.3 Serial Management Interface The serial control interface uses a simple two-wired serial interface to obtain and control the status of the physical layer through the MII interface. The serial control interface consists of MDC (Management Data Clock), and MDI/O (Management Data Input/Output) signals. The MDIO pin is bi-directional and may be shared by up to 32 devices. 9.3.4 Management Interface - Read Frame Structure MDC MDIO Read 32 "1"s Idle Preamble 0 SFD 1 1 0 A4 A3 PHY Address Write A0 R4 R3 R0 0 D15 D14 // Data Read // D1 D0 Idle Z Op Code Register Address Turn Around 9.3.5 Management Interface - Write Frame Structure MDC MDIO Write 32 "1"s Idle Preamble 0 SFD 1 0 1 A4 A3 PHY Address A0 R4 R3 R0 1 0 D15 D14 Data D1 D0 Idle Op Code Register Address Write Turn Around Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 49 DM8203 2-port switch with MII / RMII Interface 9.4 Internal PHY functions 9.4.1 100Base-TX Operation The transmitter section contains the following functional blocks: - 4B5B Encoder - Scrambler - Parallel to Serial Converter - NRZ to NRZI Converter - NRZI to MLT-3 - MLT-3 Driver 9.4.1.1 4B5B Encoder The 4B5B encoder converts 4-bit (4B) nibble data generated by the MAC Reconciliation Layer into a 5-bit (5B) code group for transmission, see reference Table 1. This conversion is required for control and packet data to be combined in code groups. The 4B5B encoder substitutes the first 8 bits of the MAC preamble with a J/K code-group pair (11000 10001) upon transmit. The 4B5B encoder continues to replace subsequent 4B preamble and data nibbles with corresponding 5B code-groups. At the end of the transmit packet, upon the desertions of the Transmit Enable signal from the MAC Reconciliation layer, the 4B5B encoder injects the T/R code-group pair (01101 00111) indicating the end of frame. After the T/R code-group pair, the 4B5B encoder continuously injects IDLEs into the transmit data stream until Transmit Enable is asserted and the next transmit packet is detected. By scrambling the data, the total energy presented to the cable is randomly distributed over a wide frequency range. Without the scrambler, energy levels on the cable could peak beyond FCC limitations at frequencies related to the repeated 5B sequences, like the continuous transmission of IDLE symbols. The scrambler output is combined with the NRZ 5B data from the code-group encoder via an XOR logic function. The result is a scrambled data stream with sufficient randomization to decrease radiated emissions at critical frequencies. 9.4.1.3 Parallel to Serial Converter The Parallel to Serial Converter receives parallel 5B scrambled data from the scrambler, and serializes it (converts it from a parallel to a serial data stream). The serialized data stream is then presented to the NRZ to NRZI encoder block 9.4.1.4 NRZ to NRZI Encoder After the transmit data stream has been scrambled and serialized, the data must be NRZI encoded for compatibility with the TP-PMD standard, for 100Base -TX transmission over Category-5 unshielded twisted pair cable. 9.4.1.5 MLT-3 Converter The MLT-3 conversion is accomplished by converting The data stream output, from the NRZI encoder into two binary data streams, with alternately phased logic One event. 9.4.1.6 MLT-3 Driver The two binary data streams created at the MLT-3 converter are fed to the twisted pair output driver, which converts these streams to current sources and alternately drives either side of the transmit transformer's primary winding, resulting in a minimal current MLT-3 signal. 9.4.1.2 Scrambler The scrambler is required to control the radiated emissions (EMI) by spreading the transmit energy across the frequency spectrum at the media connector and on the twisted pair cable in 100Base-TX operation. 50 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 9.4.1.7 4B5B Code Group Symbol 0 1 2 3 4 5 6 7 8 9 A B C D E F I J K T R H V V V V V V V V V V Meaning Data 0 Data 1 Data 2 Data 3 Data 4 Data 5 Data 6 Data 7 Data 8 Data 9 Data A Data B Data C Data D Data E Data F Idle SFD (1) SFD (2) ESD (1) ESD (2) Error Invalid Invalid Invalid Invalid Invalid Invalid Invalid Invalid Invalid Invalid 4B code 3210 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 undefined 0101 0101 undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined Table 1 5B Code 43210 11110 01001 10100 10101 01010 01011 01110 01111 10010 10011 10110 10111 11010 11011 11100 11101 11111 11000 10001 01101 00111 00100 00000 00001 00010 00011 00101 00110 01000 01100 10000 11001 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 51 DM8203 2-port switch with MII / RMII Interface 9.4.2 100Base-TX Receiver The 100Base-TX receiver contains several function blocks that convert the scrambled 125Mb/s serial data to synchronous 4-bit nibble data. The receive section contains the following functional blocks: - Signal Detect - Digital Adaptive Equalization - MLT-3 to Binary Decoder - Clock Recovery Module - NRZI to NRZ Decoder - Serial to Parallel - Descrambler - Code Group Alignment - 4B5B Decoder 9.4.2.1 Signal Detect The signal detects function meets the specifications mandated by the ANSI XT12 TP-PMD 100Base-TX standards for both voltage thresholds and timing parameters. 9.4.2.2 Adaptive Equalization When transmitting data over copper twisted pair cable at high speed, attenuation based on frequency becomes a concern. In high speed twisted pair signaling, the frequency content of the transmitted signal can vary greatly during normal operation based on the randomness of the scrambled data stream. This variation in signal attenuation, caused by frequency variations, must be compensated for to ensure the integrity of the received data. In order to ensure quality transmission when employing MLT-3 encoding, the compensation must be able to adapt to various cable lengths and cable types depending on the installed environment. The selection of long cable lengths for a given implementation requires significant compensation, which will be over-killed in a situation that includes shorter, less attenuating cable lengths. Conversely, the selection of short or intermediate cable lengths requiring less compensation will cause serious under-compensation for longer length cables. Therefore, the compensation or equalization must be adaptive to ensure proper conditioning of the received signal independent of the cable length. 52 9.4.2.3 MLT-3 to NRZI Decoder The DM8203 decodes the MLT-3 information from the Digital Adaptive Equalizer into NRZI data. 9.4.2.4 Clock Recovery Module The Clock Recovery Module accepts NRZI data from the MLT-3 to NRZI decoder. The Clock Recovery Module locks onto the data stream and extracts the 125 MHz reference clock. The extracted and synchronized clock and data are presented to the NRZI to NRZ decoder. 9.4.2.5 NRZI to NRZ The transmit data stream is required to be NRZI encoded for compatibility with the TP-PMD standard for 100Base-TX transmission over Category-5 unshielded twisted pair cable. This conversion process must be reversed on the receive end. The NRZI to NRZ decoder receives the NRZI data stream from the Clock Recovery Module and converts it to a NRZ data stream to be presented to the Serial to Parallel conversion block. 9.4.2.6 Serial to Parallel The Serial to Parallel Converter receives a serial data stream from the NRZI to NRZ converter. It converts the data stream to parallel data to be presented to the descrambler. 9.4.2.7 Descrambler Because of the scrambling process requires to control the radiated emissions of transmit data streams, the receiver must descramble the receive data streams. The descrambler receives scrambled parallel data streams from the Serial to Parallel converter, and it descrambles the data streams, and presents the data streams to the Code Group alignment block. Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 9.4.2.8 Code Group Alignment The Code Group Alignment block receives un-aligned 5B data from the descrambler and converts it into 5B code group data. Code Group Alignment occurs after the J/K is detected and subsequent data is aligned on a fixed boundary. 9.4.2.9 4B5B Decoder The 4B5B Decoder functions as a look-up table that translates incoming 5B code groups into 4B (Nibble) data. When receiving a frame, the first 2 5-bit code groups receive the start-of-frame delimiter (J/K symbols). The J/K symbol pair is stripped and two nibbles of preamble pattern are substituted. The last two code groups are the end-of-frame delimiter (T/R Symbols). The T/R symbol pair is also stripped from the nibble, presented to the Reconciliation layer. 9.4.3 10Base-T Operation The 10Base-T transceiver is IEEE 802.3u compliant. When the DM8203 is operating in 10Base-T mode, the coding scheme is Manchester. Data processed for transmit is presented in nibble format, converted to a serial bit stream, then the Manchester encoded. When receiving, the bit stream, encoded by the Manchester, is decoded and converted into nibble format. 9.4.4 Collision Detection For half-duplex operation, a collision is detected when the transmit and receive channels are active simultaneously. Collision detection is disabled in full duplex operation. 9.4.5 Carrier Sense Carrier Sense (CRS) is asserted in half-duplex operation during transmission or reception of data. During full-duplex mode, CRS is asserted only during Receive operations. 9.4.6 Auto-Negotiation The objective of Auto-negotiation is to provide a means to exchange information between linked devices and to automatically configure both devices to take maximum advantage of their abilities. It is important to note that Auto-negotiation does not test the characteristics of the linked segment. The Auto-Negotiation function provides a means for a device to advertise supported modes of operation to a remote link partner, acknowledge the receipt and understanding of common modes of operation, and to reject un-shared modes of operation. This allows devices on both ends of a segment to establish a link at the best common mode of operation. If more than one common mode exists between the two devices, a mechanism is provided to allow the devices to resolve to a single mode of operation using a predetermined priority resolution function. Auto-negotiation also provides a parallel detection function for devices that do not support the Auto-negotiation feature. During Parallel detection there is no exchange of information of configuration. Instead, the receive signal is examined. If it is discovered that the signal matches a technology, which the receiving device supports, a connection will be automatically established using that technology. This allows devices not to support Auto-negotiation but support a common mode of operation to establish a link. 9.5 HP Auto-MDIX Functional Descriptions The DM8203 supports the automatic detect cable connection type, MDI/MDIX (straight through/cross over). A manual configuration by register bit for MDI or MDIX is still accepted. When set to automatic, the polarity of MDI/MDIX controlled timing is generated by 16-bits LFSR. The switching cycle time is located from 200ms to 420ms. The polarity control is always switch until detect received signal. After selected MDI or MDIX, This feature is able to detect the required cable connection type. (Straight through or crossed over) and make correction automatically Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 53 DM8203 2-port switch with MII / RMII Interface RX + /- from DM8203 RX+/- to RJ45 TX + /- from DM8203 * MDI: __________ * MDIX: - - - - - - - - - TX+/- to RJ45 54 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 10. DC and AC Electrical Characteristics 10.1 Absolute Maximum Ratings Symbol Parameter VCC3 3.3V Supply Voltage VCCI 1.8V core power supply AVDD3 Analog power supply 3.3V AVDDI Analog power supply 1.8V VIN DC Input Voltage (VIN) Storage Temperature range TSTG Ambient Temperature TA Lead Temperature LT (TL, soldering, 10 sec.). 10.2 Operating Conditions Symbol VCC3 VCCI AVDD3 AVDDI PD (Power Dissipation) Parameter 3.3V Supply Voltage 1.8V core power supply Analog power supply 3.3V Analog power supply 1.8V 100BASE-TX 10BASE-TX Min. 3.135 1.71 3.135 1.71 Typ. 230 70 140 250 360 30 170 40 Max. 3.465 1.89 3.465 1.89 Unit V V V V mA mA mA mA mA mA mA mA Conditions 1.8V only 3.3V only TX idle, 1.8V only 50% utilization, 1.8V only 100% utilization, 1.8V only 3.3V only 1.8V only 3.3V only Min. -0.3 -0.3 -0.3 -0.3 -0.5 -65 0 Max. 3.6 1.95 3.6 1.95 5.5 +150 +70 +260 Unit V V V V V C C C Conditions Lead-free Device Auto-negotiation or cable off Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 55 DM8203 2-port switch with MII / RMII Interface 10.3 DC Electrical Characteristics Symbol Inputs VIL VIH IIL IIH Outputs VOL VOH Receiver VICM Parameter Input Low Voltage Input High Voltage Input Low Leakage Current Input High Leakage Current Output Low Voltage Output High Voltage Min. 2.0 -1 2.4 Typ. 1.8 Max. 0.8 1 0.4 Unit V V uA uA V V V Conditions Vcond1 Vcond1 VIN = 0.0V, Vcond1 VIN = 3.3V, Vcond1 IOL = 4mA IOH = -4mA 100 Termination Across Peak to Peak Peak to Peak Absolute Value Absolute Value RX+/RX- Common Mode Input Voltage Transmitter VTD100 100TX+/- Differential Output Voltage VTD10 10TX+/- Differential Output Voltage ITD100 100TX+/- Differential Output Current ITD10 10TX+/- Differential Output Current 1.9 4.4 19 44 2.0 5 20 50 2.1 5.6 21 56 V V mA mA Note: Vcond1 = VCC3 = 3.3V, VCCI = 1.8V, AVDD3 = 3.3V, AVDDI = 1.8V. 10.4 AC characteristics 10.4.1 Power On Reset Timing T1 PWRST# T4 Strap pins T2 EECS T3 Symbol T1 T2 T3 T4 Parameter PWRST# Low Period Strap pin hold time with PWRST# PWRST# high to EECS high PWRST# high to EECS burst end Min. 1 40 - Typ. 5 -- Max. 4 Unit ms ns us ms Conditions - 56 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 10.4.2 Port 2 MII Interface Transmit Timing TXC2 TXE2 T1 TXD2_3~0 T2 Symbol Parameter T1 TXE2,TXD2_3~0 Setup Time T2 TXE2,TXD2_3~0 Hold Time 10.4.3 Port 2 MII Interface Receive Timing Min. Typ. 32 8 Max. Unit ns ns RXC2 RXER2,RXDV2 T1 RXD2_3~0 T2 Symbol Parameter T1 RXER2, RXDV2,RXD2_3~0 Setup Time T2 RXER2, RXDV2,RXD2_3~0 Hold Time Min. 5 5 Typ. Max. Unit ns ns Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 57 DM8203 2-port switch with MII / RMII Interface 10.4.4 MII Management or host SMI Interface Timing T1 MDC or SMI_CK T2 MDIO (drived by DM8203) or SMI_DIO T3 MDIO (drived by exetrnal MII) or SMI_DIO T5 T4 Symbol T1 T2 T3 T4 T5 Parameter MDC or SMI_CK Frequency MDIO or SMI_DIO by DM8203 Setup Time MDIO or SMI_DIO by DM8203 Hold Time MDIO or SMI_DIO by External MII Setup Time MDIO or SMI_DIO by External MII Hold Time Min. Typ. 0.52 955 960 Max. 40 40 Unit MHz ns ns ns ns 58 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 10.4.5 EEPROM timing T1 EECS T3 EECK T4 EEDIO T5 T7 T6 T2 Symbol T1 T2 T3 T4 T5 T6 T7 Parameter EECS Setup Time EECS Hold Time EECK Frequency EEDIO Setup Time in output state EEDIO Hold Time in output state EEDIO Setup Time in input state EEDIO Hold Time in input state Min. Typ. 480 2080 0.38 460 2100 Max. 8 8 Unit ns ns MHz ns ns ns ns Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 59 DM8203 2-port switch with MII / RMII Interface 11. Application circuit 11.1 Main circuit DVDD_33V DVDD_18V DVDD_5V I C1 220uF C2 0.1uF C3 0.1uF C4 0.1uF C5 0.1uF C6 220uF C7 0.1uF U6 IN DVDD_33V AP1117-3.3V O OUT OUT 4 C31 220uF C32 0.1uF C DVDD_33V DVDD_33V 3 D5 1N4148 R22 1 2 10K U7 RESET_IC_(AP1701DW) J7 J8 J9, J11 J5 SW1 on is P2 force link mode (100Mbus FULL mode) on is P2 fix mode (100Mbps mode) J10 on is P2 use Reverse-MII mode on is P2 use RMII mode DVDD_33V on is use EEPROM TXE2 EECK TXD2_2 TXC2 TXD2_3 Port 0 fix FX mode Port 1 fix FX mode EECS TXER2 TXD2_0 TXD2_1 MDIO TXD2_0 TXD2_1 RXER2 JP6 DC-JACK J7 J8 1 1 2 2 JUMPER JUMPER R23 R24 R25 RXC2 R26 4.7k 4.7k 4.7k 4.7k J9 1 J10 1 J11 1 R27 R28 R29 R30 R51 R52 R53 R31 DVDD_5V 1 MDC TXD2_0 TXD2_1 TXD2_2 TXD2_3 CRS2 COL2 TXE2 RXER2 TXC2 RXC2 RXD2_0 RXD2_1 RXD2_2 RXD2_3 SMI_DIO 2 JUMPER 2 JUMPER 2 JUMPER NC(4.7k) NC(4.7k) NC(4.7k) NC(4.7k) 4.7k 4.7k 4.7k 4.7k GND G 1 3 2 AVDD_33V AVDD_18V LNK0_LED SPD0_LED LNK1_LED SPD1_LED C D1 LEDA C D3 LEDA LEDA LEDA 4 3 2 1 R1 330 5 6 7 8 A DVDD_33V C D2 C D4 R50 0 PWRST# C30 10uF C12 220uF C13 0.1uF C14 0.1uF C15 220uF C16 0.1uF C17 0.1uF power on reset (select one use) DVDD_33V L1 AVDD_33V EECS EECK EEDIO AVDD_18V F.B/120/SO805 VCNTL 2SB1386 B E Q1 C DVDD_18V L2 J5 JUMPER 1 2 EEPROM U2 1 2 3 4 CS VCC SK DC DI ORG DO GND 93LC46 8 7 6 5 DVDD_33V AVDD_18V C19 0.1uF RX0RX0+ TX01 2 3 4 5 6 7 8 R5 R6 R7 49.9/1% R8 R9 R10 75/1% 75/1% 75/1% C8 C11 0.1uF 0.01uF/2KV RJ45_SPD RJ45_LINK 74HC04 SPD0_LED 1 U3A C18 Disable Port 2 MDIO pull Low, TXE2 float (J7 off). Enable pot 2, please remove MDIO pull Low resister (R51) RX+ NC RXMCT NC TX+ NC TX16 15 14 13 12 11 10 9 JP1 RJ-45_LED 1 2 3 4 5 6 7 8 U1 RDNC RD+ NC CT TDNC TD+ R13 10K Y1 LED2+ LED216 15 C21 0.1uF C22 0.1uF X1 1 2 X2 TX0+ R4 49.9/1% L3 F.B/120/SO805 25MHz/49US C27 C28 22pF 22pF MAGCOM_HS9024 49.9/1% 49.9/1% 14 13 LED1+ LED1- F.B/120/SO805 3 1.4K/1% R14 RX0+ RX0TX0+ TX0RX1+ RX1TX1+ TX1AVDD_33V AVDD_18V DVDD_18V DVDD_33V 2 C9 0.1uF C10 0.1uF VREF R11 R12 512 512 C29 0.1uF 2 U3B 0.1uF C20 JP5 0.1uF FX_SD 1 FX_SD_TEST U5 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 VCNTL VREF X1 X2 LNK1_LED SPD1_LED LNK0_LED SPD0_LED SMI_CK SMI_DIO 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 BGRESG BGRES AVDD33 RX0RX0+ AGND TX0TX0+ AVDD18 AVDD33 RX1RX1+ AGND TX1TX1+ AVDD18 LNK0_LED 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 3 74HC04 4 VCNTL VREF DVDD33 X1 X2 DGND LNK1_LED SPD1_LED LNK0_LED SPD0_LED TEST2 SMI_CK DVDD18 SMI_DIO TEST3 DGND DM8203E 3 Port switch DVDD33 MDC MDIO DGND TXD2_3 TXD2_2 TXD2_1 DGND TXD2_0 TXE2 DVDD18 TXC2 DVDD33 TXER2 CRS2 DGND TEST1 DGND PWRST# EECS EECK EEDIO DVDD33 RXD2_0 RXD2_1 DGND RXD2_2 RXD2_3 RXDV2 RXC2 RXER2 COL2 PWRST# EECS EECK EEDIO RXD2_0 RXD2_1 RXD2_2 RXD2_3 RXDV2 RXC2 RXER2 COL2 C24 0.1uF R15 49.9/1% R16 49.9/1% AVDD_18V U4 1 2 3 4 5 6 7 8 R18 49.9/1% RDNC RD+ NC CT TDNC TD+ RXNC RX+ MCT NC TXNC TX+ 16 15 14 13 12 11 10 9 JP2 8 7 6 5 4 3 2 1 RJ-45 RX1+ R37 RX1- R38 0 0 R32 R33 127/1% 127/1% FX_RX+ FX_RXFX_SD FX_TXFX_TX+ R41 83/1% R42 83/1% R34 R35 127/1%69/1% RX1- R46 0 0 0 0 TP_RXTP_RX+ TP_TXTP_TX+ R17 49.9/1% RX1+ R47 TX1TX1+ R48 R49 TX1TX1+ R39 R40 0 0 MAGCOM_HS9016 R19 R20 R21 75/1% 75/1% 75/1% C23 C26 0.1uF 0.01uF/2KV R43 R44 83/1% 182/1% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 DM8203E C25 0.1uF Title TXD2_3 TXD2_2 TXD2_1 TXD2_0 TXE2 TXER2 CRS2 MDC MDIO TXC2 Size B Date: DAVICOM Semiconductor Inc. DM8203E_EVB circuit f or DM8203-E5 Document Number DM8203E EVB Tuesday , August 26, 2008 Sheet 1 of 1 Rev V1.0 60 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 MDIO RXDV2 SMI_CK DVDD_33V R36 69/1% 1 2 3 4 5 6 7 8 9 R45 182/1% Fiber_3.3v PWRST# TXER2 JP4 DVDD_33V DVDD_5V 31 29 27 25 23 21 19 17 15 13 11 9 7 5 3 1 JP3 HEADER_16X2 DM8203 2-port switch with MII / RMII Interface 11.2 Application of Reverse MII Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 61 DM8203 2-port switch with MII / RMII Interface 12. Package Information 64 Pins LQFP Package Outline Information: Symbol A A1 A2 b b1 c c1 D D1 E E1 e L L1 R1 R2 S 1 2 3 Min 0.05 1.35 0.17 0.17 0.09 0.09 0.45 0.08 0.08 0.20 o 0 o 0 Dimension in mm Nom 1.40 0.22 0.20 12.00 BSC 10.00 BSC 12.00 BSC 10.00 BSC 0.50 BSC 0.60 1.00 REF o 3.5 o 12 TYP o 12 TYP Max 1.60 0.15 1.45 0.27 0.23 0.20 0.16 0.75 0.20 o 7 - Dimension in inch Min Nom Max 0.063 0.002 0.006 0.053 0.055 0.057 0.007 0.009 0.011 0.007 0.008 0.009 0.004 0.008 0.004 0.006 0.472 BSC 0.394 BSC 0.472 BSC 0.394 BSC 0.020 BSC 0.018 0.024 0.030 0.039 REF 0.003 0.003 0.008 0.008 o o o 0 3.5 7 o 0 o 12 TYP o 12 TYP 1. Dimension D1 and E1 do not include resin fin. 2. All dimensions are base on metric system. 3. General appearance spec should base on its final visual inspection spec. 62 Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 DM8203 2-port switch with MII / RMII Interface 13. Ordering Information Part Number DM8203EP Pin Count 64 Package LQFP (Pb-free) reference purposes only. DAVICOM's terms and conditions printed on the order acknowledgment govern all sales by DAVICOM. DAVICOM will not be bound by any terms inconsistent with these unless DAVICOM agrees otherwise in writing. Acceptance of the buyer's orders shall be based on these terms. Disclaimer The information appearing in this publication is believed to be accurate. Integrated circuits sold by DAVICOM Semiconductor are covered by the warranty and patent indemnification provisions stipulated in the terms of sale only. DAVICOM makes no warranty, express, statutory, implied or by description regarding the information in this publication or regarding the information in this publication or regarding the freedom of the described chip(s) from patent infringement. FURTHER, DAVICOM MAKES NO WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PURPOSE. DAVICOM reserves the right to halt production or alter the specifications and prices at any time without notice. Accordingly, the reader is cautioned to verify that the data sheets and other information in this publication are current before placing orders. Products described herein are intended for use in normal commercial applications. Applications involving unusual environmental or reliability requirements, e.g. military equipment or medical life support equipment, are specifically not recommended without additional processing by DAVICOM for such applications. Please note that application circuits illustrated in this document are for Company Overview DAVICOM Semiconductor Inc. develops and manufactures integrated circuits for integration into data communication products. Our mission is to design and produce IC products that are the industry's best value for Data, Audio, Video, and Internet/Intranet applications. To achieve this goal, we have built an organization that is able to develop chipsets in response to the evolving technology requirements of our customers while still delivering products that meet their cost requirements. Products We offer only products that satisfy high performance requirements and which are compatible with major hardware and software standards. Our currently available and soon to be released products are based on our proprietary designs and deliver high quality, high performance chipsets that comply with modem communication standards and Ethernet networking standards. Contact Windows For additional information about DAVICOM products, contact the Sales department at: Headquarters Hsin-chu Office: No.6 Li-Hsin Rd. VI, Science-based Park, Hsin-chu City, Taiwan, R.O.C. TEL: +886-3-5798797 FAX: +886-3-5646929 MAIL: sales@davicom.com.tw HTTP: http://www.davicom.com.tw WARNING Conditions beyond those listed for the absolute maximum may destroy or damage the products. In addition, conditions for sustained periods at near the limits of the operating ranges will stress and may temporarily (and permanently) affect and damage structure, performance and/or function. Preliminary datasheet DM8203-15-DS-P05 October 23, 2008 63 |
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