Response id zero (respid0), Response id one, Respid1) – Avago Technologies LSI53C825AE User Manual
Page 174: Response, Id zero (respid0), Response id one (respid1), Register: 0x4a (0xca), Register: 0x4b (0xcb)
4-86
Registers
Response ID Zero (RESPID0)
Read/Write
RESPID0
Response ID Zero
[7:0]
RESPID0 and
contain the
selection or reselection IDs. In other words, these two
8-bit registers contain the ID that the chip responds to on
the SCSI bus. Each bit represents one possible ID with
the most significant bit of
representing ID 15 and the least significant bit of
RESPID0 representing ID 0. The
register still contains the chip ID used during arbitration.
The chip can respond to more than one ID because more
than one bit can be set in the
and
registers.
However, the chip can arbitrate with only one ID value in
the
register.
Register: 0x4B (0xCB)
Response ID One (RESPID1)
Read/Write
RESPID1
Response ID One
[15:8]
RESPID0 and
contain the
selection or reselection IDs. In other words, these two
8-bit registers contain the ID that the chip responds to on
the SCSI bus. Each bit represents one possible ID with
the most significant bit of
representing ID 15 and the least significant bit of
RESPID0 representing ID 0. The
register still contains the chip ID used during arbitration.
The chip can respond to more than one ID because more
than one bit can be set in the
7
0
ID
x
x
x
x
x
x
x
x
15
8
ID
x
x
x
x
x
x
x
x