6 pci interrupt signals, Table 3.6 pci interrupt signals, Pci interrupt signals – Avago Technologies LSI53C876E User Manual
Page 82: Pci interrupt, Signals
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Signal Descriptions
3.1.6 PCI Interrupt Signals
describes the signals PCI Interrupt Signals group.
Table 3.6
PCI Interrupt Signals
Name
Pin No.
Type
Strength
Description
INTA/
195, B6
O
16 mA PCI
Interrupt Function A. This signal, when asserted LOW,
indicates an interrupting condition in SCSI Function A
and that service is required from the host CPU. The
output drive of this pin is open drain with an internal
weak pull-up. If the SCSI Function B interrupt is
rerouted at power-up using the INTA/ enable sense
resistor (pull-down on MAD4), then this signal indicates
an interrupt in either SCSI Function A or SCSI
Function B.
INTB/
194, C7
O
16 mA PCI
Interrupt Function B. This signal, when asserted LOW,
indicates an interrupting condition in SCSI Function B
and that service is required from the host CPU. The
output drive of this pin is open drain with an internal
weak pull-up. This interrupt can be rerouted at
power-up using the INTA/ enable sense resistor
(pull-down on MAD4). This causes the LSI53C876 to
program the SCSI Function B PCI register Interrupt Pin
(3D) to 0x01.