LSI53C825AJ LSI, LSI53C825AJ Datasheet - Page 127
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: 0x0A (0x09)
SCSI Selector ID (SSID)
Read Only
VAL
R
ENID[3:0]
Register: 0x0B (0x8B)
SCSI Bus Control Lines (SBCL)
Read Only
REQ
ACK
BSY
SEL
ATN
Operating Registers
REQ
VAL
7
0
7
x
ACK
6
x
6
x
SCSI Valid
If VAL is asserted, then the two SCSI IDs are detected
on the bus during a bus-initiated selection or reselection,
and the encoded destination SCSI ID bits below are valid.
If VAL is deasserted, only one ID is present and the
contents of the encoded destination ID are meaningless.
Reserved
Encoded Destination SCSI ID
Reading the
immediately after the LSI53C825A 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 above.
Assert SCSI REQ/ Signal
Assert SCSI ACK/ Signal
Assert SCSI BSY/ Signal
Assert SCSI SEL/ Signal
Assert SCSI ATN/ Signal
BSY
R
x
5
x
SCSI Destination ID (SDID)
SEL
4
x
4
x
ATN
3
0
3
x
MSG
0
2
x
ENID[3:0]
register
C/D
0
1
x
I/O
0
0
0
x
[6:4]
[3:0]
4-39
7
7
6
5
4
3
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