LSI53C825AJ LSI, LSI53C825AJ Datasheet - Page 132

• Manufacturer Part Number: LSI53C825AJ
• Manufacturer: LSI

Specifications of LSI53C825AJ

• Lead Free Status / RoHS Status: Not Compliant

4-44
AIP
LOA
WOA
RST/
SDP0/
Register: 0x0E (0x8E)
SCSI Status One (SSTAT1)
Read Only
FF[3:0]
Registers
7
0
0
FF[3:0]
Arbitration in Progress
Arbitration in Progress (AIP = 1) indicates that the
LSI53C825A has detected a Bus Free condition, asserted
BSY, and asserted its SCSI ID onto the SCSI bus.
Lost Arbitration
When set, LOA indicates that the LSI53C825A has
detected a bus free condition, arbitrated for the SCSI bus,
and lost arbitration due to another SCSI device asserting
the SEL/ signal.
Won Arbitration
When set, WOA indicates that the LSI53C825A has
detected a Bus Free condition, arbitrated for the SCSI
bus and won arbitration. The arbitration mode selected in
the
arbitration and selection to set this bit.
SCSI RST/ Signal
This bit reports the current status of the SCSI RST/
signal, and the RST signal (bit 6) in the
(ISTAT)
as it is read.
SCSI SDP0/ Parity Signal
This bit represents the present state of the SCSI SDP0/
parity signal. This signal is not latched and may change
as it is read.
FIFO Flags
These four bits, along with
bit 4, define the number of bytes or words that currently
reside in the LSI53C825A SCSI synchronous data FIFO.
These bits are not latched and they will change as data
moves through the FIFO.
SCSI Control Zero (SCNTL0)
0
register. This bit is not latched and may change
4
0
SDPOL
3
x
SCSI Status Two
MSG
2
x
register must be full
Interrupt Status
C/D
1
x
(SSTAT2),
I/O
0
x
[7:4]
4
3
2
1
0