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PRELIMINARY
CY7C9235
SMPTE-259M/DVB-ASI Scrambler/Controller
Features
* Fully compatible with SMPTE-259M -- SMPTE-125M compliant for 4:2:2 component video -- SMPTE-244M compliant for 4fsc composite video Fully compatible with DVB-ASI Operates from a single +5V or -5V supply 44-pin PLCC package Encodes both 8- and 10-bit parallel digital streams for any rate from 16-40 M characters/sec (160-400 Mbits/sec serial) * Operates with CY7B9234 SMPTE HOTLinkTM serializer/transmitter * X9 + X4 + 1 scrambler and NRZI encoder may be bypassed for raw data output * * * * a CY7B9234 HOTLink transmitter, which then converts the bit-parallel characters into a SMPTE-259M compatible high-speed serial data stream. This device performs both TRS (sync) detection and filtering, data scrambling with the SMPTE-259M X 9 + X4 + 1 algorithm, and NRZ-to-NRZI encoding. These functions operate at any character rate from 16- to 40 MHz. For those systems operating with non-SMPTE-259M compliant video streams (or for diagnostic purposes), the scrambler and NRZI encoding functions can be disabled. DVB-ASI Operation The CY7C9235 also contains the necessary multiplexers, control inputs, and outputs, to sequence out a DVB-ASI compliant video stream. DVB-ASI operation is enabled through activation of a single input signal. This allows a single serial output port to support both SMPTE and DVB data streams under software or hardware control. In DVB-ASI mode the CY7C9235 operates with two enable signals (ENA and ENN) to allow data to be presented from either synchronous (clocked) or asynchronous FIFOs. When data is not available, the CY7C9235 ensures that the proper fill character (K28.5) is generated by the attached CY7B9234 serializer. The CY7C9235 operates from a single +5V or -5V supply. It is available in a 44-pin PLCC space saving package.
Functional Description
SMPTE-259M Operation The CY7C9235 is a CMOS integrated circuit designed to encode SMPTE-125M and SMPTE-244M bit-parallel digital characters (or other data formats) using the SMPTE-259M encoding rules. Following encoding, the characters are output as bit-parallel characters ready for serialization. The encoded outputs of the CY7C9235 are designed to be directly mated to
Logic Block Diagram
PD 9 (SVS) TRS_DET
TRS FILTER / DETECTOR
PD 8 PD 7 PD 6 PD 5 PD 4 PD 3 PD 2 PD 1 PD 0 (SC/D) TRS_FILT SC/D_EN SVS_EN BYPASS DVB_EN ENA ENN
Q 9 (SVS)
SMPTE SCRAMBLER
Q8
10
NRZI ENCODER
10
10
Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q 0 (SC/D)
10 INPUT REGISTER
10
MODE MULTIPLEXOR
OUTPUT REGISTER
ENA_OUT
CKW OE
Cypress Semiconductor Corporation
*
3901 North First Street
*
San Jose
*
CA 95134
*
408-943-2600 March 19, 1999
PRELIMINARY
HOTLink is a trademark of Cypress Semiconductor Corporation.
CY7C9235
Pin Configuration
Q 9 (SVS)
V CC
V SS
Q8
Q7
Q6
Q5
Q4
Q3
Q2 41
6 TRS_DET TRS_FILT SVS_EN OE V SS V SS V SS BYPASS DVB_EN NC PD 9 (SVS) 7 8 9 10 11 12 13 14 15 16 17 18 PD 8
5
4
3
2
1
44
43
42
40 39 Q 0 (SC/D) ENA_OUT ENN ENA CKW V SS V SS V SS SC/D_EN NC NC
NC
Q1 38 37 36 35 34 33 32 31 30 29 28 PD 0 (SC/D)
PLCC Top View
19 PD 7
20 PD 6
21 PD 5
22 V CC
23 V SS
24 PD 4
25 PD 3
26 PD 2
27 PD 1
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature ..................................... -40C to +125C Supply Voltage to Ground Potential..................-0.5V to +7.0V DC Voltage Applied to Outputs in High-Z State.....................................................-0.5V to +7.0V Output Current into Outputs......................................... 16 mA DC Input Voltage .................................................-0.5V to +7.0V Static Discharge Voltage .............................................. > 2001 V (per MIL-STD-883, Method 3015) DC Input Current ............................................................. 20 mA Latch-Up Current............................................................>200 mA
Operating Range
Range Commercial Industrial Ambient Temperature 0C to +70C -40C to +85C VCC 5V 5% 5V 10%
2
PRELIMINARY
Pin Descriptions
CY7C9235 SMPTE-259M Encoder Name ENA I/O Input Description
CY7C9235
Enable Parallel Data. If ENA is LOW at the rising edge of CKW, the data present on the PD0-9 inputs is latched, and routed to the Q 0-9 outputs. This pin is only interpreted when DVB_EN is active (LOW). If the CY7C9235 is only used in SMPTE-259M mode this signal should be tied to V SS. Enable Next Parallel Data. If ENN is LOW at the rising edge of CKW, the data present on the PD0-9 inputs at the next rising edge of TXCLK is latched, and routed to the Q 0-9 outputs. This pin is only interpreted when DVB_EN is active (LOW). If the CY7C9235 is only used in SMPTE-259M mode this signal should be tied to V SS. Bypass SMPTE Encoding. BYPASS is ignored if DVB_EN is active (LOW). If BYPASS is HIGH at the rising edge of CKW (and DVB_EN is HIGH), the data latched into the input register is routed around both the SMPTE scrambler and the NRZI encoder and presented to the output register. If BYPASS is LOW at the rising edge of the CKW clock (and DVB_EN is HIGH), the data present in the input register is routed through the SMPTE scrambler and NRZI encoder. TRS Character Detected. This output indicates when a character used in the TRS sequence is detected in the input register. If the data contains any of the reserved characters of 000-003 or 3FC-3FF in 10-bit hex, the output will be LOW for one clock period. If the character in the input register is any other pattern (or DVB_EN is LOW) this output will remain HIGH. TRS Character Filter. This signal controls an internal filter that converts the low-order two bits of all TRS characters to same state as the upper eight bits. This allows a proper 30-bit TRS ID to be generated when the CY7C9235 is operated with 8-bit or non-standard video streams. When this signal is LOW, all characters from 000-003 are converted to 000, and all characters from 3FC-3FF are converted to 3FF. When TRS_FILT is disabled (HIGH), all characters are passed to the scrambler without modification. This signal has no effect when DVB_EN is active (LOW). Send Violation Symbol Enable. This input is only valid when DVB_EN is active (LOW). If SVS_EN is HIGH and a HIGH input is present on PD9, Q9 will also be high on a following clock cycle, forcing the CY7B9234 serializer to generate an invalid 8B/10B character. If SVS_EN is LOW, the level present on PD9 is ignored and Q9 is forced to a LOW state. Special Character/Data Select Enable. This input is only valid when DVB_EN is active (LOW). If SC/D_EN is HIGH and a HIGH input is present on PD0, Q0 will also be high on a following clock cycle, forcing the CY7B9234 serializer to generate an 8B/10B control character as selected by the character present on the PD8-1 inputs. If SC/D_EN is LOW, the level present on PD0 is ignored and Q 0 is forced to a LOW (data only) state. Parallel Data 9 or Send Violation Symbol. This is the MSB of the input data field. It is latched in the input register at the rising edge of CKW. When DVB_EN is active (LOW) and SVS_EN is HIGH, this latched input is routed to the output register bit Q9 (SVS). When DVB_EN is active (LOW) and SVS_EN is LOW, output register bit Q 9 (SVS) is forced to a LOW (zero) level. When DVB_EN is inactive (HIGH), this latched input is routed to the scrambler and NRZI encoder. Parallel Data 8 through 1. The signals present at the PD 8-1 inputs are latched in the input register at the rising edge of CKW. When DVB_EN is HIGH, these signals are the middle eight bits of the SMPTE 10-bit data field, and are then routed to the scrambler and NRZI encoder. When DVB_EN is active (LOW), these signals are full DVB-ASI data bus, and are then routed to the Q8-1 outputs. Parallel Data 0 or Special Code/Data Select. This is the LSB of the input data field. It is latched in the input register at the rising edge of CKW. When DVB_EN is active (LOW) and SC/D_EN is HIGH, this input is routed to output register bit Q0 (SVS). When DVB_EN is active (LOW) and SC/D_EN is LOW, output register bit Q0 (SC/D) is forced to a LOW (zero) level. When DVB_EN is inactive (HIGH), this input data bit is routed through the input register and the scrambler and NRZI encoder. Output Bit 9. This is the MSB of the output register. It should be connected directly to the CY7B9234 serializer input signal SVS(Dj). Output Bits 8 through 1. These signals should be connected directly to the CY7B9234 serializer input signals D7-0 respectively.
ENN
Input
BYPASS
Input
TRS_DET
Output
TRS_FILT
Input
SVS_EN
Input
SC/D_EN
Input
PD9(SVS)
Input
PD8-1
Input
PD0(SC/D)
Input
Q9(SVS) Q8-1
Output Output
3
PRELIMINARY
Pin Descriptions (continued)
CY7C9235 SMPTE-259M Encoder Name Q0(SC/D) DVB_EN I/O Output Input Description
CY7C9235
Output Bit 0. This is the LSB of the output register. It should be connected directly to the CY7B9234 serializer input signal SC/D(Da). DVB Mode Enable. This signal is sampled by the rising edge of the CKW clock. If DVB_EN is active (LOW), the data present on the PD0-9, ENA, and ENN inputs are latched and routed to the Q 0-9 and ENA_OUT outputs. Clock Write. This clock controls all synchronous operations of the CY7C9235. It operates at the character rate which is equivalent to one tenth the serialized bit-rate. This clock also connects directly to the CKW input of the CY7B9234 serializer. Enable Parallel Data Out. This output attached directly to the CY7B9234 ENA input, and identifies when valid data is available at the CY7C9235 outputs. If used only for SMPTE-259M data streams, this output may be left open, with the ENA input to the CY7B9234 directly connected to V SS. Output Enable. When this signal is HIGH all outputs are driven to their normal logic levels. When LOW, all outputs are placed in a High-Z state. Power. Ground.
CKW
Input
ENA_OUT
Output
OE VCC VSS
Input
CY7C9235 Description
Input Register The input register is clocked by the rising edge of CKW. This register captures the data present at the PD 0-9 inputs on every clock cycle. In addition to the data inputs, all control inputs except OE are also captured at each rising edge of CKW. This includes BYPASS, DVB_EN, SVS_EN, SC/D_EN, TRS_DET, TRS_FILT, ENN, and ENA. TRS Filter The TRS Filter is used to convert all 8-bit TRS characters (000-003 and 3FC-3FF in 10-bit hex) to their full 10-bit value. If TRS_FILT is active (LOW) and any of these values are detected in the input register, the lower two bits are forced to either zeros or ones respectively. This allows the encoder to be used with both 8- and 10-bit SMPTE character streams. If TRS_FILT is HIGH, the filter function is disabled and all characters are passed from the input register to the SMPTE scrambler unmodified. TRS Detector When operated in SMPTE mode (DVB_EN is HIGH), the TRS detector looks for the most significant eight bits of the input register to be either all ones or all zeros. If either of these values are detected, the TRS_DET output will go LOW following the rising edge of CKW, and remain LOW until a character is detected in the input register that is not all zeros or ones, or DVB_EN is latched LOW. SMPTE Scrambler The SMPTE scrambler implements a parallel encoded version of a linear-feedback shift register. It encodes the data present in the input register using the X9 + X 4 + 1 polynomial to increase the transition density of the serial data stream and to decrease the DC-content of the transmitted serial bit stream. NRZI Encoder The scrambled data is also fed through an NRZ-to-NRZI encoder. This also increases the transition density of the serial data stream, decreases the DC-content of the transmitted serial bit stream, and makes the serial stream insensitive to polarity inversions. DVB-ASI Operation The CY7C9235 is designed to operate in both SMPTE-259M and DVB-ASI environments. When operated in SMPTE-only environments, the DVB control inputs may be tied to either V CC or VSS as needed to place them in a known state. When not used for DVB operation, the ENA, ENN, SVS_EN, and SC/D_EN inputs many be tied to either VCC or VSS. DVB_EN must be tied or driven HIGH. DVB-ASI operation is enabled by asserting DVB_EN LOW. This signal is latched by the rising edge of the CKW clock. When the CY7C9235 is placed in DVB mode, the SMPTE and NRZI encoders are bypassed, and the data latched into the input register is routed directly to the output register.
Error Propagation
For those DVB-ASI implementations that do not require propagation of detected errors, the Q9 output may be forced to a zero by setting SVS_EN LOW. When SVS_EN is HIGH (and the encoder is in DVB mode) the PD 9 data latched into the input register is routed to the output register and to the CY7B9234 SVS input. Command Code Generation The DVB-ASI interface does not normally transmit any command characters other than the K28.5 code that is used both for synchronization and as a fill character when data is not being transmitted. These K28.5 characters may be generated by two methods; by controlling when the CY7C9235 is enabled
4
PRELIMINARY
using the ENA and ENN inputs, or by placing a C5.0 character on the PD9-0 inputs when one of the two enables is active. If the generation of K28.5 fill characters is to be controlled using the ENA or ENN inputs, the SC/D_EN input should be driven LOW or connected to V SS. This will insure that the PD0
CY7C9235
data bit is not routed to the output register by forcing the Q0 output to always be LOW. If the generation of a K28.5 characters is controlled by transmission of a C5.0 character, the SC/D_EN input must be HIGH to allow the PD0 input to be propagated to the Q0 output.
Electrical Characteristics Over the Operating Range
Parameter VOH VOL VIH VIL IIX IOZ IOS ICC Description Output HIGH Voltage Output LOW Voltage Input HIGH Voltage Input LOW Voltage Input Load Current Output Leakage Current Output Short Circuit Current Power Supply Current
[2,3]
Test Conditions VCC=Min., IOH = -3.2 mA VCC=Min., IOL = 16.0 mA Guaranteed Input Logical HIGH Voltage for all Inputs [1] Guaranteed Input Logical HIGH Voltage for all Inputs[1] VI = VCC or VSS VO = VCC or VSS VCC = Max., VOUT = 0.5V VIN, VI/O = VCC or VSS
Min. 2.4
Max.
Unit V
0.5 2.0 -0.5 -10 -50 -10 7.0 0.8 +10 +50 -80
V V V A A mA mA
Capacitance[3]
Parameter CIN COUT Description Input Capacitance Output Capacitance Test Conditions VIN = 5.0V at f = 1 MHz VOUT = 5.0V at f = 1 MHz Max. 10 12 Unit pF pF
Notes: 1. These are absolute values with respect to device ground. All overshoots due to system or tester noise are included. 2. Not more than one output should be tested at a time. Duration of the short circuit should not exceed 1 second. VOUT = 0.5V has been chosen to avoid test problems caused by tester ground degradation. 3. Tested initially and after any design or process changes that may affect these parameters.
5
PRELIMINARY
AC Test Loads and Waveforms
TTL OUTPUTS 5V OUTPUT 35 pF INCLUDING JIG AND SCOPE 170 238 238 5V OUTPUT 5 pF 170
CY7C9235
ALL INPUT PULSES 3.0V 90% GND < 2 ns 10% 90% 10% < 2 ns
(a)
INCLUDING JIG AND (b) SCOPE Equivalent to: THEVENIN 99 OUTPUT
EQUIVALENT 2.08V
7C9335-9
Switching Characteristics Over the Operating Range[4]
CY7C9235-27 Parameter tSD tHD tCPWH tCPWL tCKW tA tH tEA Data Set-Up Time Data Hold Time CKW Pulse Width HIGH CPW Pulse Width LOW Write Clock Period Access Time Data Output Hold Time From CKW Rise Input to Output Enable
[5]
CY7C9235-40 Min. 8 0 6.5 6.5 Max. Unit ns ns ns ns 62.5 8 3 20 20 ns ns ns ns ns
Description
Min. 10 0 6.5 6.5 30 4
Max.
62.5 10 23 23
25
Input to Output Disable tER Notes: 4. All AC parameters are with all outputs switching. 5. Test load (b) used for this parameter. Test load (a) used for all other AC parameters.
Switching Waveform
tCKW tSD tHD
PD 0-9, ENA, ENN, BYPASS, TRS_FILT, SVS_EN, SC/D_EN, DVB_EN
CKW
tCPWL tA tCPWH
Q0-9 , TRS_DET, ENA_OUT
tER tEA tH
OE
6
PRELIMINARY
v
CY7C9235
Ordering Information
Ordering Code CY7C9235-270JC CY7C9235-400JC Document #: 38-00571-A Package Name J67 J67 Package Type 44-pin Plastic Leaded Chip Carrier 44-pin Plastic Leaded Chip Carrier Operating Range Commercial Commercial
Package Diagram
44-Lead Plastic Leaded Chip Carrier J67
51-85003-A
(c) Cypress Semiconductor Corporation, 1999. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress Semiconductor product. Nor does it convey or imply any license under patent or other rights. Cypress Semiconductor does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges.

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