Product manual

Figure 14. Command descriptor block transfer
Description Symbol Typical Max
Command byte transfer T22
<0.08 µsec 0.15 µsec
Next command byte
access *
T23
<6.5 µsec 1.0 µsec
* T23 is used, except for byte 7 of a 10-byte CDB. A 6-byte CDB requires
less than 5 µsec for five T23 occurrences. A 10-byte CDB requires
less than 110 µsec for 9 occurrences.
1
0
–ATN
–SEL
–BUSY
–I/O
–MSG
–C/D
–REQ
–ACK
T22
T23 T22 T23
– DB(7 – 0,P)
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
First byte Second byte Last byte
126 ST3655 Family SCSI Drives Product Manual, Rev. A