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C141-E124-01EN 3 - 19
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.
* Set at shipping time
f) ACE (AIP checking enabled)
This specifies whether or not it is permitted to check AIP (Asynchronous Information
Protection).
"1" (Permitted): Permitting check
"0"*(Prohibited): Prohibiting check
* Set at shipping time