LSI 53C810A Manuale Utente
Parity Options
2-7
Table 2.2
SCSI Parity Control
EPC
AESP
Description
0
0
Does not check for parity errors. Parity is generated when sending
SCSI data. Asserts odd parity when sending SCSI data.
SCSI data. Asserts odd parity when sending SCSI data.
0
1
Does not check for parity errors. Parity is generated when sending
SCSI data. Asserts even parity when sending SCSI data.
SCSI data. Asserts even parity when sending SCSI data.
1
0
Checks for odd parity on SCSI data received. Parity is generated
when sending SCSI data. Asserts odd parity when sending SCSI
data.
when sending SCSI data. Asserts odd parity when sending SCSI
data.
1
1
Checks for odd parity on SCSI data received. Parity is generated
when sending SCSI data. Asserts even parity when sending SCSI
data.
when sending SCSI data. Asserts even parity when sending SCSI
data.
1. Key:
EPC = Enable Parity Checking (bit 3,
ASEP = Assert SCSI Even Parity (bit 2,
).
Table 2.3
SCSI Parity Errors and Interrupts
DPH
PAR
Description
0
0
Halts when a parity error occurs in the target or initiator mode and
does not generate an interrupt.
does not generate an interrupt.
0
1
Halts when a parity error occurs in the target mode and generates
an interrupt in target or initiator mode.
an interrupt in target or initiator mode.
1
0
Does not halt in target mode when a parity error occurs until the
end of the transfer. An interrupt is not generated.
end of the transfer. An interrupt is not generated.
1
1
Does not halt in target mode when a parity error occurs until the
end of the transfer. An interrupt is generated.
end of the transfer. An interrupt is generated.
Key:
DHP = Disable Halt on SATN/ or Parity Error (bit 5,
DHP = Disable Halt on SATN/ or Parity Error (bit 5,
.
PAR = Parity Error (bit 0,
.
This table only applies when the Enable Parity Checking bit is set.