DEVICE SPECIFICATION
S5933
PCI CONTROLLER
3.1.4 Arbitration Pins (Bus Masters Only) — PCI Local Bus
Signal
REQ#
GNT#
Type
Description
out
Request. This signal is sourced by an agent wishing to become the bus master. It is a
point-to-point signal and each master has its own REQ#.
in
Grant. The GNT# signal is a dedicated, point-to-point signal provided to each poten-
tial bus master and signifies that access to the bus has been granted.
3.1.5 Error Reporting Pins — PCI Local Bus
Signal
Type
Description
PERR#
s/t/s
Parity Error. This pin is used for reporting parity errors during the data portion of a
bus transaction for all cycles except a Special Cycle. It is sourced by the agent
receiving data and driven active two clocks following the detection of the error. This
signal is driven inactive (high) for one clock cycle prior to returning to the tri-state
condition.
SERR#
o/d
System Error. This pin is used for reporting address parity errors, data parity errors
on Special Cycle commands, or any error condition having a catastrophic system
impact.
3.1.6 Interrupt Pin — PCI Local Bus
Signal
INTA#
Type
Description
o/d
Interrupt A. This pin is a level sensitive, low active interrupt to the host. The INTA#
interrupt must be used for any single function device requiring an interrupt capability.
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