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AM7968-125JC Scheda tecnica(PDF) 83 Page - Advanced Micro Devices |
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AM7968-125JC Scheda tecnica(HTML) 83 Page - Advanced Micro Devices |
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83 / 127 page ![]() AMD 79 TAXIchip Integrated Circuits Technical Manual Figure 7-4 Receiver Timing—8-Bit Cascade Mode Internal Clock* SERIN Serial Data NRZ Data* CLK OUT IGM TAXI #1 = CNB TAXI #2 DATA OUT Command OUT DSTRB OUT Command OUT DATA OUT DATA N DATA N SYNC DATA 1 DATA 2 SYNC SYNC SYNC 3 2 NO CHANGE COMMAND 0 11000100011100010001 NO CHANGE NO CHANGE NO CHANGE NO CHANGE CNB TAXI #1 = 1 NO CHANGE NO CHANGE NO CHANGE NO CHANGE DATA N–1 NO CHANGE NO CHANGE NO CHANGE NO CHANGE DATA N NO CHANGE 1 456 1100010001 DATA 1 DATA 2 11000100011100010001 CSTRB OUT NO CHANGE NO CHANGE NO CHANGE NO CHANGE NO CHANGE CSTRB OUT DSTRB OUT * Internal Signals 1100010001 SYNC SYNC NO CHANGE NO CHANGE TAXI #2 TAXI #1 12330E-26 If CNB is HIGH, the Receiver will catch the next valid byte of data and hold it. It will not attempt to catch any more data until it sees a Sync command from the Transmitter or until its CNB goes LOW and then HIGH again. If CNB is held LOW, the Receiver will not attempt to capture any data. When the Primary Receiver RX1 catches a valid data byte it will raise its IGM (I Got Mine) so the next Receiver RX2 can catch the next byte and so on down the line. After all the receivers in the system have received their bytes a Sync must be sent or the next byte of data will be lost(3) . Referring to Figure 7-5 for a system of Cascaded Receivers. (3) In the Auto-Repeat Configuration, a Sync is not required. |
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