LSI LSI53C1000, Technical Manual

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3-8 Signal Descriptions
3.3.4 Arbitration Signals
Table 3.5 describes the Arbitration Signals group.
3.3.5 Error Reporting Signals
Table 3.6 describes the Error Reporting Signals group.
Table 3.5 Arbitration Signals
Name Bump Type Strength Description
REQ/ H2 O 8 mA PCI Request indicates to the system arbiter that this agent
requests use of the PCI bus. This is a point-to-point signal.
Every master has its own REQ/ signal.
GNT/ H4 I N/A Grant indicates to a specific agent that access to the PCI bus
has been granted. This is a point-to-point signal. Every
master has its own GNT/ signal.
Table 3.6 Error Reporting Signals
Name Bump Type Strength Description
PERR/ R4 S/T/S 8 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. 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/ R3 O 8 mA PCI System Error is an open drain output used to report
address parity errors as well as critical errors other than
parity.