Scsi Parity Control; Scsi Parity Errors And Interrupts - LSI LSI53C875A Technical Manual

Table 2.4

SCSI Parity Control

1
EPC ASEP
0
0
1
1
1. EPC = Enable Parity Checking (bit 3
2. ASEP = Assert SCSI Even Parity (bit 2
Table 2.5

SCSI Parity Errors and Interrupts

1
DHP PAR
0
0
1
1
1. DHP = Disable Halt on SATN/ or Parity Error (bit 5
2. PAR = Parity Error (bit 0
2-26
2
Description
0 Does not check for parity errors. Parity is generated when sending
SCSI data. Asserts odd parity when sending SCSI data.
1 Does not check for parity errors. Parity is generated when sending
SCSI data. Asserts even parity when sending SCSI data.
0 Checks for odd parity on SCSI data received. Parity is generated when
sending SCSI data. Asserts odd parity when sending SCSI data.
1 Checks for odd parity on SCSI data received. Parity is generated when
sending SCSI data. Asserts even parity when sending SCSI data.
SCSI Control Zero
SCSI Control One
2
Description
0 Halts when a parity error occurs in the target or initiator mode and does
NOT generate an interrupt.
1 Halts when a parity error occurs in the target mode and generates an
interrupt in the target or initiator mode.
0 Does not halt in target mode when a parity error occurs until the end
of the transfer. An interrupt is not generated.
1 Does not halt in target mode when a parity error occurs until the end
of the transfer. An interrupt is generated.
SCSI Interrupt Enable Zero
Functional Description
(SCNTL0)).
(SCNTL1)).
SCSI Control One (SCNTL1)).
(SIEN0)).