Avago Technologies LSI53C1010R - Manual (Page 157)

SCSI Registers 4-39
Version 2.2 Copyright © 2000–2003 by LSI Logic Corporation. All rights reserved.
C_D Assert SCSI C_D/ Signal 1
I_O Assert SCSI I_O/ Signal 0
Register: 0x0A
SCSI Selector ID (SSID)
Read Only
VAL SCSI Valid 7
If VAL is asserted, then the two SCSI IDs are detected
on the bus during a bus-initiated selection or reselection,
and the following encoded destination SCSI ID bits are
valid. If VAL is deasserted, only one ID is present and the
contents of the encoded destination ID are meaningless.
R Reserved [6:4]
ENID Encoded Destination SCSI ID [3:0]
Reading the SSID register immediately after the
LSI53C1010R SCSI function is selected or reselected
returns the binary-encoded SCSI ID of the device that
performed the operation. These bits are invalid for targets
that are selected under the single initiator option of the
SCSI-1 specification. This condition is detected by
examining the VAL bit in this register.
7 6 4 3 0
VAL R ENID
0 x x x 0 0 0 0