Epson S1R72104 Technical Manual page 28

After the execution, the IC enters Initiator mode.
Reselect(0DH)
Executes the re-selection phase..
Valid only when it is not connected.
If issued in the connected condition, it sets SCSIINT2 and CMDER bits, causing interruption. If any other
command is under execution then, it continues execution.
The IC acts as follows:
Waits for busfree.
Enters arbitration after detecting busfree.
if it wins arbitration, it assets XSSEL, XSIO and ID bits, entering the re-selection phase.
After that, it sets GOOD bit of MAININT register.
It causes interruption.
After the execution, the IC enters Target mode.
Wait_Reselect(0EH)
Waits for the re-selection phase.
Valid only when it is not connected.
If issued in the connected condition, it sets SCSIINT2 and CMDER bits, causing interruption. If any other
command is under execution then, it continues execution.
The IC acts as follows:
Enters the condition waiting for re-selection.
After that, it sets GOOD bit of MAININT register.
It causes interruption.
After that, the IC enters Initiator mode.
Wait_SCAM_Selection_Command(0FH)
Waits for SCAM selection, and causes interruption after the selection is made.
Valid only when it is not connected.
If issued in the connected condition, it sets SCSIINT2 and CMDER bits, causing interruption. If any other
command is under execution then, it continues execution.
If this command is issued, set STATN (bit5) of SCSIMODE register, and clear it when the command is over.
After the command was issued, the IC acts as follows:
Waits for the SCAM/normal selection phase.
Does not respond to, but ignores, SCSI selection with the selection time-out delay less than 4ms.
Responds to SCAM selection, causing interruption.
If no SCAM selection occurs, the IC responds to the selection which continues for 4ms or longer, and acts like
Wait_Select_Command (0Ch) after that.
After that, the IC enters Target mode.
Negate_ACK(11H)
Clears ACK left asserted by the last message transfer in Initiator mode when the LSI stopped operation.
Command_Out(12H)
Executes SCSI command phase.
Valid only in the connected condition. It can be issued in either Target or Initiator mode.
If issued in the disconnected condition, it sets SCSIINT2 and CMDER bits, causing interruption.
In Target mode
The IC acts as follows:
Enters this command into FIFO after setting its command byte number in NON-DMA data-size register.
This control command does not distinguish command groups automatically. It is used when any group
command which has undefined command block length is received or other cases.
After that, it sets GOOD bit of MAININT register.
Rev.1.1
S1R72104 Technical Manual
EPSON 23