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SCD1284 Datasheet(PDF) 66 Page - Intel Corporation |
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SCD1284 Datasheet(HTML) 66 Page - Intel Corporation |
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66 / 176 page  CD1284 — IEEE 1284-Compatible Parallel Interface Controller 66 Datasheet Figure 9. CD1284 Receive Character Processing (Continued) CR/NL PROCESSING ENABLED CHAR = CR OR NL C D E COR4[7:5] 000 - No action 001 - NL to CR 010 - CR to NL 011 - CR to NL; NL to CR ? ? Y Y N PARITY ERROR HANDLING = ‘100’ ? Y N ERROR FLAG SET ? Y N Y N CHAR = X’FF ? ? N Y PUT FF,00, CHAR IN FIFO PUT FF, CHAR IN FIFO PUT CHAR IN FIFO 100 - Discard CR 101 - Discard CR; NL to CR 110 - Discard CR 111 - Discard CR; NL to CR N Y N Y N PARITY ERROR HANDLING = ‘011’ ? PARITY ERROR HANDLING = ‘010’ ? PARITY ERROR HANDLING = ‘001’ ? POST EXCEPTION SERVICE REQUEST Y Y N Y N ?? BREAK PROCESSING MODE = ‘10’ ? POST EXCEPTION SERVICE REQUEST DISCARD CHAR PUT CHAR IN FIFO PUT 00 IN FIFO DISCARD CHAR PUT 00 IN FIFO PUT CHAR IN FIFO N BREAK PROCESSING MODE = ‘11’ BREAK FLAG SET Y DONE PARITY ERROR FLAG SET PARITY N |
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