3.1 Control/Sense Commands
C141-E167 3 -
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* Set at shipping time
b) UNTATN (UNIT ATTENTION report mode)
This specifies the response method to commands received from the INIT when the IDD is
holding a UNIT ATTENTION condition:
"1"* (Report): The IDD reports a CHECK CONDITION status (Standard SCSI specification)
in response to commands other than INQUIRY and REQUEST SENSE.
"0" (No Report): The IDD terminates all commands that are received normally. (A CHECK
CONDITION status which causes a UNIT ATTENTION condition is not
reported.)
* Set at shipping time
c) SDTR (synchronous data transfer request)
Specifies whether or not it is permitted for the TARG to request a synchronous mode data
transfer.
"1" (Permitted) : After the power is switched on, after a RESET condition occurs or when the
first command is received following reception of a BUS DEVICE RESET
message, if a SYNCHRONOUS DATA TRANSFER REQUEST (SDTR)
message is not sent by the INIT, the IDD sends the SDTR message and
attempts to establish synchronous mode data transfer.
"0"* (Prohibited): Even if it is necessary to establish synchronous mode data transfer, no SDTR
message is sent from the IDD. However, if a SDTR message is sent from the
INIT, the IDD responds normally.
* Set at shipping time
d) RSRTY (reselection retry)
This specifies the number of retries in the RESELECTION phase.
"1" *: Unlimited
"0": 10 times
* Set at shipping time
e) PHSCRC (Phase CRC)
This bit specifies where send or receive the CRC bytes in the DT Data IN/OUT transfer.
"1" * (Phase): After the all transfer is terminated or before the phase during data transfer
changes other phase, the CRC bytes are sent or recieved.
"0" (Block): The CRC bytes are sent or recieved in each block boundary.
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