4 arbitration signals, Table 3.4 arbitration signals, 5 error reporting signals – Avago Technologies LSI53C876E User Manual
Page 81: Table 3.5 error reporting signals, Arbitration signals, Error reporting signals
PCI Interface Signals
3-9
3.1.4 Arbitration Signals
describes the signals for the Arbitration Signals group.
3.1.5 Error Reporting Signals
describes the signals for the Error Reporting Signals group.
Table 3.4
Arbitration Signals
Name
Pin No.
Type
Strength
Description
REQ/
200, A4
O
16 mA PCI
Request indicates to the system arbiter that this agent
desires use of the PCI bus. Both SCSI functions share the
GNT/ signal.
GNT/
199, B5
I
N/A
Grant indicates to the agent that access to the PCI bus has
been granted. Both SCSI functions share the GNT/ signal.
Table 3.5
Error Reporting Signals
Name
Pin No.
Type
Strength
Description
PERR/
30, M2
S/T/S
16 mA PCI
Parity Error may be pulsed active by an agent that
detects a data parity error. PERR/ can be used by any
agent to signal data corruption. However, on detection
of a PERR/ pulse, the central resource may generate a
nonmaskable interrupt to the host CPU, which often
implies the system is unable to continue operation once
error processing is complete.
SERR/
32, M4
O
16 mA PCI
System Error is an open drain output is used to report
address parity errors.