Fujitsu MAN3184 SERIES Specifications page 64

(5) Timeout procedure
If the INIT cannot detect the response from TARG when the Selection Timeout Delay or longer
has passed after starting the SELECTION phase, the timeout procedure shall be performed through
one of the following schemes:
a) The case of creating Reset condition
The INIT should assert the RST signal.
b) The case of no response from the selected TARG
1) The INIT should continue asserting the SEL signal.
2) If the INIT creates an attention condition, The INIT should keep ATN signal asserted.
3) The INIT should release DB(15-0,P_CRCA,and/or P1).
4) If the INIT has not detected the BSY signal to be true after at least one Selection Abort
Time plus two System Deskew Delays, the INIT should release the SEL signal and ATN
signal (if Selection using attention condition) allowing the SCSI bus to go to the BUS
FREE phase.
5) SCSI devices should ensure that when responding to selection was still valid within one
Selection Abort Time of their assertion of the BSY signal.
6) Failure to comply with this requirement could result in an improper selection (two TARG
connected to the same INIT, wrong TARG connected to an INIT, or a TARG connected to
no INIT).
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