LSI LSI53C896, Technical Manual

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SCSI Registers 4-45
AIP Arbitration in Progress 4
Arbitration in Progress (AIP = 1) indicates that the
LSI53C896 SCSI function has detected a Bus Free
condition, asserted SBSY, and asserted its SCSI ID onto
the SCSI bus.
LOA Lost Arbitration 3
When set, LOA indicates that the LSI53C896 SCSI
function has detected a bus free condition, arbitrated for
the SCSI bus, and lost arbitration due to another SCSI
device asserting the SSEL/ signal.
WOA Won Arbitration 2
When set, WOA indicates that the LSI53C896 SCSI
function has detected a Bus Free condition, arbitrated for
the SCSI bus and won arbitration. The arbitration mode
selected in the
SCSI Control Zero (SCNTL0) register
must be full arbitration and selection to set this bit.
RST SCSI RST/ Signal 1
This bit reports the current status of the SCSI RST/
signal, and the RST signal (bit 3) in the
SCSI Control
One (SCNTL1) register. This bit is not latched and may
change as it is read.
SDP0 SCSI SDP0 Parity Signal 0
This bit represents the present state of the SCSI SDP0/
parity signal. This signal is not latched and may change
as it is read.
Register: 0x0E
SCSI Status One (SSTAT1)
Read Only
FF[3:0] FIFO Flags [7:4]
These four bits, along with SCSI Status Two (SSTAT2)
bit 4, define the number of bytes or words that currently
reside in the LSI53C896’s SCSI synchronous data FIFO
as shown in
Table 4.6 . These bits are not latched and
they will change as data moves through the FIFO.
7 4 3 2 1 0
FF[3:0] SDP0L MSG C_D I/O
0 0 0 0 x x x x
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