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5-48 Operating Registers
Register: 0x40 (0xC0)
SCSI Interrupt Enable Zero (SIEN0)
Read/Write
This register contains the interrupt mask bits that correspond to the
interrupting conditions described in the SCSI Interrupt Status Zero
(SIST0) register. An interrupt is masked by clearing the appropriate mask
bit. For more information on interrupts, see Chapter 2, “Functional
Description.”
M/A SCSI Phase Mismatch - Initiator Mode;
SCSI ATN Condition - Target Mode 7
In the initiator mode, this bit is set when the SCSI phase
asserted by the target and sampled during SREQ/ does
not match the expected phase in the SCSI Output Control
Latch (SOCL) register. This expected phase is
automatically written by SCSI SCRIPTS. In target mode,
this bit is set when the initiator asserts SATN/. See the
Disable Halt on Parity Error or SATN/ Condition bit in the
SCSI Control One (SCNTL1) register for more
information on when this status is actually raised.
CMP Function Complete 6
Indicates full arbitration and selection sequence is
completed.
SEL Selected 5
Indicates the LSI53C810A is selected by a SCSI target
device. Set the Enable Response to Selection bit in the
SCSI Chip ID (SCID) register for this to occur.
RSL Reselected 4
Indicates the LSI53C810A is reselected by a SCSI
initiator device. Set the Enable Response to Reselection
bit in the SCSI Chip ID (SCID) register for this to occur.
SGE SCSI Gross Error 3
This bit controls whether an interrupt occurs when the
LSI53C810A detects a SCSI Gross Error. The following
conditions are considered SCSI Gross Errors:
76543210
M/A CMP SEL RSL SGE UDC RST PAR
00000000