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Z53C80 Datasheet(PDF) 37 Page - Zilog, Inc. |
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Z53C80 Datasheet(HTML) 37 Page - Zilog, Inc. |
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37 / 40 page  37 Z53C80 SCSI ZILOG PS97SCC0200 AC CHARACTERISTICS DMA Read (Block Mode) Target Receive Table Name Description Min Max Units 1 DRQ False from /DACK True 60 ns 2 /IOR Recovery Time 120 ns 3 Data Access Time from Read Enable [1] 70 ns 4 Data Hold Time from End of /IOR 10 5 Width of /EOP Pulse [2] 50 ns 6 /IOR False to /REQ True (/ACK False) 90 ns 7 /ACK True to /REQ False 80 ns 8 /ACK False to /REQ True (/IOR False) 100 ns 9 /ACK True to READY True 70 ns 10 READY True to Valid Data 50 ns 11 /IOR False to READY False 70 ns 12 DATA Setup time to /ACK 20 13 DATA Hold Time from /ACK 30 Notes: [1] Read enable is the occurrence of both /IOR and /DACK. [2] /EOP, /IOR, and /DACK must be concurrently true for at least T5 for proper recognition of the /EOP pulse. AC CHARACTERISTICS Reset Timing Diagram /RESET 1 Figure 53. Reset AC CHARACTERISTICS Reset Table No Description Min Max Units 1 Minimum Width of /RESET 100 ns |
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