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| ASAHI KASEI [AKD4184-A] AKD4184-A Evaluation Board Rev.0 for AK4184 GENERAL DESCRIPTION The AKD4184 is an evaluation board for Analog I/F IC which includes 4-wire resistive Touch Screen Controller, Keypad Scanner, GPIO Expander, LED Bias Controller and 12bit SAR ADC. It's easy to evaluate the Touch Screen function. The AKD4184 has also 6 x 5 Matrix Keypad, Switches on board configured GPIO pin as input, LEDs for GPIO Output Circuits and LED Driver with dimmer control. Ordering guide AKD4184-A --Evaluation board for AK4184 (Control software is packed with this. This control software does not operate on Windows NT.) FUNCTION * 4-wire resistive Touch Screen Controller I/F * 6 x 5 Matrix Keypad I/F * 10pin header and 25pin D-sub connector for serial control interface * LED dimmer control * GPIO function AVDD GND IOVDD Touch Screen 8Pin Header Control Port D-sub 25Pin GPIO 8 Port Keypad 6x5 AK4184 Digital I/F 10Pin Header Digital I/F 2 10Pin Header AK7953 (LED Driver) LED Figure 1. AKD4184 Block Diagram * Circuit diagram and PCB layout are attached at the end of this manual. 2007/04 ASAHI KASEI [AKD4184-A] Operation sequence (1) Set up the power supply lines. Set up the jumper pins. JP4 LEDVIN_SEL JP3 VCC_SEL JP2 IOVDD_SEL (Open) (Short) (Open) Set up the power supply lines. [AVDD] (orange) = 2.5 3.6V : for AVDD of AK4184 (typ. 3.3V) [IOVDD] (oranege) = 1.6 3.6V : for IOVDD of AK4184 and logic (typ. 3.3V) *IOVDD should be less than AVDD. [IFVCC] (red) [LEDVIN] (red) [AGND] (black) = 1.2 3.6V : for logic (typ. 3.3V) = 2.8 5.5V : for AK7953 (typ. 3.3V) = 0V [DGND] (black) = 0V * Each supply line should be distributed from the power supply unit. (2) Set up the evaluation mode, jumper pins and DIP switches. (See the followings.) (3) Power on. The AK4184 should be resets once bringing SW31 "L" upon power-up. 2007/04 ASAHI KASEI [AKD4184-A] Evaluation mode Applicable Evaluation Mode (1) (2) (3) (4) Touch-position and touch-pressure measurement. Keypad scan function. GPIO control function. LED dimmer control function. (1) Touch-position and touch-pressure measurement. In case of evaluating a Touch Screen function of the AK4184, it is necessary to connect the Touch Panel with J1 terminal as shown Table 1. Regarding pin assignment of J1, refer to Table 1 or circuit diagram in this manual. As for the AK4184's register definitions, refer to datasheet of the AK4184. 4-wire resistive touch screen should be connected to J1. The pin assignment of J1 is shown on Table 1. No. 1 2 3 4 5 6 7 8 Name YN YP XN XP Description Touch Screen Y - plate Voltage supply Touch Screen Y + plate Voltage supply Touch Screen X - plate Voltage supply Touch Screen X + plate Voltage supply Table 1. J1 (8P Header) pin assign Set up the jumper pins. JP5 XP_SEL TSC AIN JP7 XN_SEL TSC JP6 YP_SEL TSC AIN JP8 YN_SEL TSC AIN GND The AK4184's register (Touch Screen Register) should be set to Touch Screen Operation. 2007/04 ASAHI KASEI [AKD4184-A] (2) Keypad scan function. It is possible to evaluate Keypad scan function with pushing SW1~SW30 with AKD4184. The circuit and the pin configuration for Keypad is shown on Figure 2. Scan Output 6 Scan Output 5 Scan Output 4 Scan Output 3 Scan Output 2 Sense Input 1 through 5 Scan Output 1 Drive High or Hi-Z STATE Figure 2. Keypad circuit and pin assign Keypad Control Register in AKD4184 should be set to Keypad scan mode. Per pushing any SWs, the AK4184's register should be read the Keypad Data Register (KPDATA1, 2) after the key is pressed. (3) GPIO control function. (3-1) GPIO pin as input port The input level switches by S1 (L/H). S1 GP0 GP1 GP2 GP3 GP4 GP5 GP6 GP7 1 2 3 4 5 6 7 8 H L OFF Figure 3. S1 input ports state setting 2007/04 ASAHI KASEI [AKD4184-A] Set up the jumper pins. JP9 JP10 JP11 JP12 JP13 JP14 JP15 JP16 GP0 GP1 GP2 GP3 GP4 GP5 GP6 GP7 IN OUT The AK4184's register (GPIO Pin Direction Register) should be set GPIO pins as input. Select "L" or "H" on S1, the AK4184's register should be read from the Pin Level Register. The pin state is detected. (3-2) GPIO pin as output port AKD4184 evaluates GPIO control function with LED (GP0~GP7). Set up the jumper pins. JP9 JP10 JP11 JP12 JP13 JP14 JP15 JP16 GP0 GP1 GP2 GP3 GP4 GP5 GP6 GP7 IN OUT JP20 PULL_UP JP19 LED_EN (Open) (Open) The AK4184's register (GPIO Pin Direction Register) should be set GPIO pins as output. The AK4184's register (GPIO Pin Set/Clear Register) should be set pin level to "H". Therefore, LED (GP0~GP7) turns on. (4) LED dimmer control function. AKD4184 evaluates LED dimmer control on LED9 and LED10. Set up the jumper pin. JP18 PWM (Short) The AK4184's register (PWM Control Register) should be set to power up. The AK4184's register should be changed by Bright Control Value. Therefore, LED9 and LED10 dimmer is controlled. 2007/04 ASAHI KASEI [AKD4184-A] Other jumper pins set up [JP1] (GND) : Analog ground and Digital ground OPEN: Separated. SHORT: Common. (The connector "DGND" can be open.) 2007/04 ASAHI KASEI [AKD4184-A] The function of the toggle SW *Upper-side is "H" and lower-side is "L". [SW31] (RESETN): Power down of AK4184. Keep "H" during normal operation. Indication for LED [LED1~8] (GP0~7): Monitor GP0~7 pin of the AK4184. LEDs turn on when GP0~7 pin is "H" level. [LED9, 10]: Monitor BRCONT pin for the AK4184. LED turns on when LED controller power up. Serial Control The AKD4184 can be connected via the printer port (parallel port) of IBM-AT compatible PC. Connect PORT1 (CTRL) with PC by D-sub 25pin parallel cable. 2007/04 ASAHI KASEI [AKD4184-A] Input/Output Circuits (1) Touch Screen Input Circuits JP8 TSC AIN GND J1 1 2 3 4 5 6 7 8 8P HEADER YN_SEL TSC AIN TSC GND TSC J2 YN AIN_XPYN 2 1 3 XP 4 5 JP17 AIN_SEL J3 AIN_YP 2 1 3 4 5 AIN JP5 XP_SEL XP JP7 XN_SEL XN JP6 YP_SEL YP YN Figure 4. Touch Screen Input Circuits (2) Keypad Input Circuits C1 C2 C3 C4 C5 C6 R1 SW1 SW6 SW11 SW16 SW21 SW26 TACT SW TACT SW TACT SW TACT SW TACT SW TACT SW R2 SW2 SW7 SW12 SW17 SW22 SW27 TACT SW TACT SW TACT SW TACT SW TACT SW TACT SW R3 SW3 SW8 SW13 SW18 SW23 SW28 TACT SW TACT SW TACT SW TACT SW TACT SW TACT SW R4 SW4 SW9 SW14 SW19 SW24 SW29 TACT SW TACT SW TACT SW TACT SW TACT SW TACT SW R5 SW5 SW10 SW15 SW20 SW25 SW30 TACT SW TACT SW TACT SW TACT SW TACT SW TACT SW Figure 5. Keypad Input Circuit 2007/04 ASAHI KASEI [AKD4184-A] (3) GPIO Input/Output Circuits VCC 16 15 14 13 12 11 10 9 12345678 S1 SW DIP-8 ---------OFF--------- 1 2 3 4 5 6 7 8 RN1 9 8 7 6 5 4 3 2 1 IN IN IN IN IN IN IN JP9 GP0 JP10 GP1 JP11 GP2 JP12 GP3 JP13 GP4 JP14 GP5 JP15 GP6 IN 100k JP16 GP7 OUT OUT OUT OUT OUT OUT OUT OUT GP7 GP6 GP5 GP4 GP3 GP2 GP1 GP0 9 8 7 6 5 4 3 2 1 RN2 100k C10 0.1u 12 11 JP20 PULL_UP 10 1 9 8 7 6 5 4 A2 B2 20 U2 2 A8 A7 A6 A5 A4 A3 VCCA GND GND 74AVC8T245 VCCB VCCB GND OE B8 B7 B6 B5 B4 B3 B1 R37 1k A A LED4 GP3 21 13 23 24 DIR 14 15 16 17 18 C11 0.1u IFVCC JP19 LED_EN A R55 100k R34 1k A LED1 GP0 R35 1k A LED2 GP1 R36 1k LED3 GP2 R38 1k A LED5 GP4 R39 1k A LED6 GP5 R40 1k LED7 GP6 A K R41 1k LED8 GP7 22 K K K 19 K A1 K 3 K Figure 6. GPIO Input/Output Circuits AKM assumes no responsibility for the trouble when using the above circuit examples. K 2007/04 ASAHI KASEI [AKD4184-A] Control Software Manual Set-up of the evaluation board and control software 1. Set up the AKD4184 board. 2. Connect IBM-AT compatible PC with AKD4184 by printer cable (D-sub 25pin). (Please install the driver from the CD-ROM when this control software is used on Windows 2000/XP. Please refer "Installation Manual of Control Software Driver by AKM device control software". In case of Windows95/98/ME, this installation is not needed. This control software does not operate on Windows NT.) 3. The AK4184 should be resets once bringing SW31 "L" upon power-up. 4. Insert the CD-ROM labeled "AK4184 Evaluation Kit" into the CD-ROM drive. 5. Access the CD-ROM drive and double-click the icon of "akd4184.exe" to set up the control program. 6. Then evaluate according to the follows. Explanation of main window When runs the control program, the window as shown in Figure 7 opens. Figure 7. Control Soft window ASAHI KASEI [AKD4184-A] 1. Touch-position and touch-pressure measurement [TP START]: When select "Touch Screen Function" and click [TP START] button with pressing point by the status or finger. The number of measurement is set by "AD Cycle/mea" box, and then display measurement results at "AD OUT Section". Display all data on an assistant window. The parameter on the "Touch Screen function" corresponds to A1-0 bits and PD bit of the AK4184's register (Touch Screen Command). [Read KEY Control]: [Key Scan]: [Write Column mask]: [Write Key mask]: [Read KPDATA1]: [Read KPDATA2]: Select drop-down list of "KEYSTS1..0", "Debounce Time" and "Keypad Hold Time", then click [Write KEY Control] button. "KEYSTS1..0", "Debounce Time" and "Keypad Hold Time" corresponds to KST1-0 bits, DBN2-0 bits and HLD2-0 bits of the AK4184's register (Keypad Control Register). Read current "Keypad Control Register" setting, then display it in "Page", "Addr" and "Data". When select "11" from drop-down list of "KEYSTS1..0" and click [Key Scan] button, initiate Keypad scan by Host instruction. Check the box of "C1" - "C6", mask the column which checked. Check the box of "KM1" - "KM30", mask the key which checked. Read "Keypad Data Register 1" (Addr 00h), then display it in "Data" and virtual keys. (Don't display keys masked in "Write Column mask".) Read "Keypad Data Register 2" (Addr 01h), then display it in "Data" and virtual keys. (Don't display keys masked in "Write Column mask" and "Write Key mask".) 2007/04 ASAHI KASEI [AKD4184-A] Explanation of GPIO window When click [OPEN GPIO] button on the main window, the window as shown in Figure 8 opens. Figure 8. [GPIO Dialog] window GPIO Data Acquisition [Pin DIR(PAGE1,GPDIR)]: Check the box of "Direction" in the GPIO Pin Assignment, then click [Write] button. And click [Read] button, then display the current setting in Hex. [Pin DIR (PAGE1, GPDIR)] corresponds to "GPIO Pin Direction Register" of the AK4184's register. [Pin Pull-up(PAGE1, GPPU)]: Check the box of "Pin Pull-up" in the GPIO Pin Assignment, then click [Write] button. And click [Read] button, then display the current setting. [Pin Pull-up (PAGE1, GPPU)] corresponds to "GPIO Pin Pull-up Register" of the AK4184's register. [Pin State(PAGE1, GPPS)]: Check the box of "Pin State", then click [Write] button. [Pin State (PAGE1, GPPS)] corresponds to "GPIO Pin State Register" of the AK4184's register. [Pin Set/Clear(PAGE1, GPSCR)]: Check the box of "Pin Set/Clear" in the GPIO Pin Assignment, then click [Write] button. [Pin Set/Clear (PAGE1, GPSCR)] corresponds to "GPIO Pin State Register" of the AK4184's register. [Pin Level(PAGE0, GPLR)]: Click [Read] button in the GPIO Pin Assignment, then read "GPIO Pin Level Register" status and display the input level in "Pin Level" < Example GPIO Input > a. Set the jumper pins of JP9~JP16 (GP0~GP7) to become "IN". b. Check the box of "Direction" (GP0~GP7) to become "Input", and click [Write] button of "Pin DIR (PAGE1, GPDIR)". c. Set the DIP SW (S1) to become either "H" or "L". d. Click [Read] button of "Pin Level (PAGE0, GPLR)". e. Display the input level in "Pin Level". 2007/04 ASAHI KASEI [AKD4184-A] < Example GPIO Output > a. Set the jumper pins of JP9~JP16 (GP0~GP7) to become "OUT", and JP19, JP20 is "Open". b. Check the box of "Direction" (GP0~GP7) to become "Output", and click [Write] button of "Pin DIR (PAGE1, GPDIR)". c. Check the box of "Pin Set/Clear" (GP0~GP7) to become either "Set High" or "Clear Low", and click [Write] button of "Pin Set/Clear (PAGE1, GPSCR)". d. LED of GP0~GP7 turns on when pin level of GP0~GP7 set "High". * If you check the box, data becomes "H" or "1". If not, "L" or "0". PWM control (LED Bias Control) [Write PWM Control]: Check the box of "LPU", "PACT" and select drop down list of "BRV", "DIV", then click [Write PWM Control] button. "LPU", "BRV", "PACT" and "DIV" corresponds to LPU bit, BRV4-0 bits, PACT bit and DIV2-0 bits of AK4184's register (PWM Control Register). < Example > a. Check the box of "PACT" to become "Normal Mode", and "LPU" is "CMOS". b. Select any value from drop down list of "BRV" and "DIV". ("BRV" modulate PWM. If value is small, become dim. If large, become bright.) c. When click [Write PWM Control] button, white LED of LED9,10 turns on. * If you check the box, data becomes "H" or "1". If not, "L" or "0". Power down control [Write PD Control]: Check the box of "KeyPad PD" and "TSC PD", then click [Write PD Control] button. "KeyPad PD" and "TSC PD" corresponds to KPPD bit and TPPD bit of AK4184's register (Power Down Register). * If you check the box, data becomes "H" or "1". If not, "L" or "0". 2007/04 ASAHI KASEI [AKD4184-A] Revision History Date (YY/MM/DD) 07/04/13 Manual Revision KM085900 Board Revision 0 Reason First edition Contents IMPORTANT NOTICE * These products and their specifications are subject to change without notice. Before considering any use or application, consult the Asahi Kasei Microsystems Co., Ltd. (AKM) sales office or authorized distributor concerning their current status. * AKM assumes no liability for infringement of any patent, intellectual property, or other right in the application or use of any information contained herein. * Any export of these products, or devices or systems containing them, may require an export license or other official approval under the law and regulations of the country of export pertaining to customs and tariffs, currency exchange, or strategic materials. * AKM products are neither intended nor authorized for use as critical components in any safety, life support, or other hazard related device or system, and AKM assumes no responsibility relating to any such use, except with the express written consent of the Representative Director of AKM. As used here: (a) A hazard related device or system is one designed or intended for life support or maintenance of safety or for applications in medicine, aerospace, nuclear energy, or other fields, in which its failure to function or perform may reasonably be expected to result in loss of life or in significant injury or damage to person or property. (b) A critical component is one whose failure to function or perform may reasonably be expected to result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or system containing it, and which must therefore meet very high standards of performance and reliability. * It is the responsibility of the buyer or distributor of an AKM product who distributes, disposes of, or otherwise places the product with a third party to notify that party in advance of the above content and conditions, and the buyer or distributor agrees to assume any and all responsibility and liability for and hold AKM harmless from any and all claims arising from the use of said product in the absence of such notification. 2007/04 5 4 3 2 1 GP4 GP5 GP6 GP7 AVDD XP XN YP 10 CN2 10pin D 9 8 7 6 5 4 3 2 YN 1 D R16 0 TP17 GP5 TP18 GP4 R15 0 1 1 TP16 GP6 R14 0 TP15 GP7 R13 0 R12 0 TP13 XP 1 1 TP14 AVDD 1 C2 10u 1 TP12 XN R11 0 TP11 YP R10 0 R9 0 1 1 TP10 YN 1 TP9 VSS1 C20 0.01u C21 0.01u C22 0.01u C23 0.01u + G4 G6 G5 G3 G2 G1 F6 F5 F4 U1 CN3 10pin GP3 R17 0 TP19 GP3 XP F3 C1 0.1u 1 CN1 10pin GP4 GP5 GP6 GP7 XN YP YN G7 NC AVDD NC VSS1 F7 GP3 PENIRQN E6 GP2 RESETN E7 GP1 CSN D6 GP0 SCLK D7 BRCONT F1 TP8 PENIRQN R8 0 10 1 1 GP2 R18 0 2 C TP20 GP2 F2 9 1 R7 0 PEN GP1 1 R19 0 3 1 GP0 R20 0 TP21 GP1 TP22 GP0 E1 TP7 RESETN TP6 CSN 1 8 R6 51 RST C E2 7 1 TP5 SCLK R5 51 CSN 4 1 PWM R21 0 5 1 R22 0 TP23 BRCONT TP24 C6 D1 TP4 DIN 6 1 R4 51 SCLK AK4184 DIN D2 5 1 TP3 DOUT R3 51 DIN 6 1 C6 R23 0 C6 C6 DOUT C1 7 1 C5 R24 0 TP25 C5 TP26 C4 4 R2 51 DOUT C7 C5 BUSY C2 TP2 BUSY 1 3 R1 0 BUSY 8 1 C4 R25 0 B6 C4 KEYIRQN B1 TP1 KEYIRQN 1 9 1 B TP27 C3 2 1 KEY B7 C3 NC C2 C1 R5 R4 R3 R2 R1 A1 1 IOVDD C3 B VSS2 10 A7 NC B5 A6 B4 A5 A4 B3 B2 A3 VSS2 C3 C3 0.1u TP29 C1 TP28 C2 1 1 TP30 R5 TP31 R4 1 TP32 R3 R29 0 TP33 1 R2 1 1 TP34 R1 TP35 VSS2 1 1 C4 10u TP36 IOVDD A2 1 10 + + R26 0 R27 0 R28 0 R30 0 R31 0 R32 0 1 2 3 4 5 6 7 8 CN4 10pin A 9 A C2 C1 R5 R4 R3 R2 R1 IOVDD Title Size A3 Date: Document Number AKD4184-A AK4184 Sheet 1 Rev 0 1 of 4 Wednesday, November 15, 2006 5 4 3 2 5 4 3 2 1 D D L1 AVDD1 T-45_OR 1 1 2 1 (short) AVDD + 2 1 C5 47u R33 10 J1 JP2 IOVDD_SEL L2 JP8 TSC AIN GND YN YN_SEL TSC AIN TSC GND TSC JP7 XN_SEL XN JP6 YP_SEL YP AGND1 T-45_BK IOVDD1 T-45_OR C 1 1 1 2 (short) IOVDD + 2 C6 47u JP3 VCC_SEL 1 2 3 4 5 6 7 8 8P HEADER C JP1 GND L3 VCC1 T-45_OR AIN 1 1 1 2 (short) VCC JP5 XP_SEL XP + 2 C7 47u J2 AIN_XPYN YN L4 IFVCC1 2 3 4 5 2 IFVCC 1 XP JP17 AIN_SEL 1 1 1 T-45_RED + 2 (short) C8 47u JP4 LEDVIN_SEL J3 AIN_YP B L5 LEDVIN1 2 3 4 5 2 LEDVIN 1 B 1 T-45_RED 1 1 + 2 (short) C9 100u DGND1 T-45_BK 1 A A Title Size A3 Date: 5 4 3 2 AKD4184-A Document Number Analog Sheet 1 Rev 0 2 of 4 Wednesday, November 15, 2006 5 4 3 2 1 D VCC D 16 15 14 13 12 11 10 9 12345678 S1 SW DIP-8 ---------OFF--------- 1 2 3 4 5 6 7 8 RN1 9 8 7 6 5 4 3 2 1 IN IN IN IN IN IN IN JP9 GP0 JP10 GP1 JP11 GP2 JP12 GP3 JP13 GP4 JP14 GP5 JP15 GP6 IN 100k JP16 GP7 C1 C2 C3 C4 C5 C6 OUT OUT OUT OUT OUT OUT OUT OUT R1 GP7 GP6 GP5 GP4 R2 GP3 GP2 GP1 RN2 GP0 R3 SW3 SW8 SW13 SW18 SW23 SW28 TACT SW TACT SW TACT SW TACT SW TACT SW TACT SW SW2 SW7 SW12 SW17 SW22 SW27 TACT SW TACT SW TACT SW TACT SW TACT SW TACT SW SW1 SW6 SW11 SW16 SW21 SW26 C C C10 0.1u JP20 PULL_UP 9 8 7 6 5 4 3 2 1 100k TACT SW TACT SW TACT SW TACT SW TACT SW TACT SW R4 SW4 SW9 SW14 SW19 SW24 SW29 12 11 10 1 9 8 7 6 5 4 U2 B 2 3 VCCA A8 A7 A6 A5 A4 A3 A2 GND GND DIR A1 TACT SW TACT SW TACT SW TACT SW TACT SW TACT SW R5 B SW5 SW10 SW15 SW20 SW25 SW30 74AVC8T245 TACT SW TACT SW TACT SW TACT SW TACT SW TACT SW VCCB VCCB GND OE B8 B7 B6 B5 B4 B3 B2 20 13 23 24 14 15 16 17 18 19 C11 0.1u IFVCC JP19 LED_EN A 22 R34 1k R35 1k R36 1k R37 1k 21 B1 R38 1k R39 1k R40 1k R41 1k LED1 GP0 LED2 GP1 LED3 GP2 LED4 GP3 LED5 GP4 LED6 GP5 LED7 GP6 LED8 GP7 A A A A A A A A K K K K K K K K R55 100k A Title Size A3 Date: 5 4 3 2 AKD4184-A Document Number GIPO, Key Pad Sheet 1 Rev 0 3 of 4 Wednesday, November 15, 2006 5 4 3 2 1 PORT1 KEYIRQN PENIRQN D BUSY U5 PEN DOUT BUSY KEY JP21 DOUT_PD DOUT 3 4 5 6 7 8 9 A1 A2 A3 A4 A5 A6 A7 A8 B1 B2 B3 B4 B5 B6 B7 B8 21 20 19 18 17 16 15 14 R43 51 R44 51 R45 51 R46 51 RESETN CSN SCLK DIN JP18 PWM PWM R56 100k R58 (open) R59 (open) U3 R57 (open) VCC C15 0.1u 10 13 25 12 24 11 23 10 22 9 21 8 20 7 19 6 18 5 17 4 16 3 15 2 14 1 PARALLEL 25P D 74AVC8T245 2 1 11 12 8 R52 100k DIR VCCA GND GND OE VCCB VCCB GND 22 24 23 C16 0.1u 13 12 11 10 EN1 EN2 NC 13 NC NC C 9 C CONT 14 VIN GND 7 R42 75 LED9 LED10 NSPW310BS NSPW310BS R51 (open) IFVCC AK7953 C12 1u GND VFB K 15 6 R53 RST 1k R54 1k PORT2 SCLK 10 CSN 8 DIN 6 RESETN 4 GND 2 VCCIO KEYIRQN PENIRQN BUSY DOUT GND VCOIL VCOIL SGND VOUT OUT2 A 16 5 1 2 3 4 C17 0.01u L H L6 LEDVIN 2 SW31 RESET U6 A 9 7 5 3 1 Digital IF K 3 1 10uH 2 D1 MA21D38 1 B C13 1u C14 (open) CSN SCLK DIN 3 4 5 6 7 8 9 10 A1 A2 A3 A4 A5 A6 A7 A8 B1 B2 B3 B4 B5 B6 B7 B8 21 20 19 18 17 16 15 14 R47 51 R48 51 R49 51 R50 51 PORT3 B 10 8 CSN 6 DIN 4 RESETN 2 9 7 5 3 1 GND SCLK DOUT GND USB I/F Board 74AVC8T245 2 C18 0.1u DIR VCCA GND GND OE VCCB VCCB GND 22 24 23 C19 0.1u 13 1 11 12 A A Title Size A3 Date: 5 4 3 2 AKD4184-A Document Number Rev LED Driver, Digital I/F Wednesday, November 15, 2006 Sheet 1 0 4 4 of |
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