squishy.gateware.scsi.common#
The following table lists the timing requirements for each SCSI version.
Name |
SCSI1 |
SCSI2 |
SCSI3 |
|---|---|---|---|
Arbitration |
2.2us |
2.4us |
2.4us |
Assertion |
90ns |
90ns |
Unspecified |
Bus Clear |
800ns |
800ns |
800ns |
Bus Free |
800ns |
800ns |
800ns |
Bus Set |
1.8us |
1.8us |
1.6us |
Bus Settle |
400ns |
400ns |
400ns |
Cable Skew |
10ns |
10ns |
4ns |
Data Release |
400ns |
400ns |
400ns |
Deskew |
45ns |
45ns |
45ns |
Hold Time |
45ns |
45ns |
Unspecified |
Negation |
90ns |
90ns |
Unspecified |
Reset Hold |
25us |
25us |
25us |
Selection Abort |
200us |
200us |
200us |
Selection Timeout |
250ms |
250ms |
250ms |
Disconnect |
Unspecified |
200us |
Unspecified |
Power to Selection |
Unspecified |
10s |
10s |
Reset to Selection |
Unspecified |
250ms |
250ms |
Fast Assert |
Unspecified |
30ns |
Unspecified |
Fast Cable Skew |
Unspecified |
5ns |
Unspecified |
Fast Deskew |
Unspecified |
20ns |
Unspecified |
Fast Hold |
Unspecified |
10ns |
Unspecified |
Fast Negation |
Unspecified |
30ns |
Unspecified |