Avago Technologies LSI53C876E - Manual (Page 82)

3-10 Signal Descriptions
3.1.6 PCI Interrupt Signals
Table 3.6 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.