MB86616 Datasheet, PDF (33/63 Pages) Fujitsu Component Limited. – IEEE1394-SCSI Tailgate

MB86616
5-7 Target Asynchronous Transfer (REQ/ACK Timing)
Parameter
Symbol Pin name
REQ↓→ACK↓
ACK↓→REQ↑
REQ↑→ACK↑
ACK↑→REQ↓ (Note 2)
ACK↓→REQ↓ (Notes 1, 2)
ts071
ts072
ts073
ts074
ts075
REQ, ACK
ACK, REQ
REQ, ACK
ACK, REQ
ACK, REQ
Values
Unit
Min.
Max.
0

ns
0
25
ns
0

ns
0
25
ns
8 tscsi
9 tscsi + 5
ns
Note1 : The “ACK rise to REQ fall” time is regulated by (ts072 + ts073 + ts074) or ts075, whichever is longer.
Note2 : In the following cases, the time regulation is not applied because data transfer is aborted.
• The data register is empty during data output to the SCSI bus.
• The data register is full during data input from the SCSI bus.
REQ
ACK
tS071
tS072
tS073
tS075
tS074
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