MB86616 Datasheet, PDF (40/63 Pages) Fujitsu Component Limited. – IEEE1394-SCSI Tailgate

MB86616
5-14 Initiator Asynchronous Transfer (REQ/ACK Timing)
Parameter
Symbol Pin name
Values
Unit
Min.
Max.
REQ↓→ACK↓ (Note 3)
ts141
REQ,
ACK
0
25
ns
ACK↓→REQ↑
ts142
ACK,
REQ
0

ns
REQ↑→ACK↑ (Note 3)
ts143
REQ,
ACK
0
1 tscsi
ns
ACK↑→REQ↓
ts144
ACK,
REQ
0

ns
REQ↑→ACK↓ (Notes 1, 3)
ts145
REQ,
ACK
8 tscsi
9 tscsi + 5
ns
REQ↑→ACK↓ (Notes 2, 3)
ts146
REQ,
ACK
4 tscsi
5 tscsi + 5
ns
REQ↓→ACK↑ (Notes 2, 3)
ts147
REQ,
ACK
8 tscsi
9 tscsi + 5
ns
Note1 : Applies to data output to the SCSI bus.
The “REQ rise to ACK fall” time is regulated by (ts143 + ts144 + ts141) or ts145, whichever is longer.
Note2 : Applies to data input from the SCSI bus.
The “REQ rise to ACK fall” time is regulated by (ts143 + ts144 + ts141) or ts146, whichever is longer.
The “REQ fall to ACK rise” time is regulated by (ts141 + ts142 + ts143) or ts147, whichever is longer.
Note3 : In the following cases, either 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.
• ATN is output upon detection of a parity error during data input from the SCSI bus.
• During transfer of the first or last byte
REQ
ACK
tS141
tS142
tS147
tS145, tS146
tS143
tS144
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