LSI53C825AJ LSI, LSI53C825AJ Datasheet - Page 175
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LSI53C825AJ
Manufacturer Part Number
LSI53C825AJ
Description
Manufacturer
LSI
Datasheet
1.LSI53C825AJ.pdf
(306 pages)
Specifications of LSI53C825AJ
Lead Free Status / RoHS Status
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Register: 0x4C (0xCC)
SCSI Test Zero (STEST0)
Read Only
SSAID[3:0]
SLT
ART
SOZ
Operating Registers
7
0
0
SSAID[3:0]
(RESPID1)
However, the chip can arbitrate with only one ID value in
the
SCSI Selected As ID
These bits contain the encoded value of the SCSI ID that
the LSI53C825A is selected or reselected as during a
SCSI selection or reselection phase. These bits are read
only and contain the encoded value of 0–15 possible IDs
that could be used to select the LSI53C825A. During a
SCSI selection or reselection phase when a valid ID is
put on the bus, and the LSI53C825A responds to that ID,
the “selected as” ID is written into these bits. These bits
are used with
Response ID One (RESPID1)
to multiple IDs on the bus.
Selection Response Logic Test
This bit is set when the LSI53C825A is ready to be
selected or reselected. This does not take into account
the bus settle delay of 400 ns. This bit is used for
functional test and fault purposes.
Arbitration Priority Encoder Test
This bit is always set when the LSI53C825A exhibits the
highest priority ID asserted on the SCSI bus during
arbitration. It is primarily used for chip level testing, but it
may be used during low level mode operation to
determine if the LSI53C825A won arbitration.
SCSI Synchronous Offset Zero
This bit indicates that the current synchronous SREQ/,
SACK/ offset is zero. This bit is not latched and may
change at any time. It is used in low level synchronous
SCSI operations. When this bit is set, the LSI53C825A
SCSI functioning as an initiator, is waiting for the target
SCSI Chip ID (SCID)
0
and
Response ID Zero (RESPID0)
4
0
Response ID Zero (RESPID0)
SLT
3
0
register.
registers to allow response
ART
2
x
SOZ
1
1
and
registers.
SOM
0
1
[7:4]
4-87
3
2
1
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