6 interrupt signals, Table 3.7 interrupt signals, Interrupt signals – Avago Technologies LSI53C1010R User Manual
Page 103
PCI Bus Interface Signals
3-9
Version 2.2
Copyright © 2000–2003 by LSI Logic Corporation. All rights reserved.
3.3.6 Interrupt Signals
describes the Interrupt Signals group.
Table 3.7
Interrupt Signals
Name
1
Bump
Type
Strength
Description
INTA/
AC8
O
8 mA PCI Interrupt Function A. This signal, when asserted LOW,
indicates that an interrupting condition in SCSI Function A
requires service from the host CPU. The output drive of this
pin is an open drain. Refer to
for
details about disabling this interrupt in a RAID environment.
This interrupt pin is disabled if INT_DIR is driven LOW.
If the SCSI Function B interrupt is rerouted at power-up
using the INTA/ enable sense resistor (pull-up on MAD4),
this signal indicates that an interrupting condition has
occurred in either SCSI Function A or SCSI Function B.
INTB/
AE7
O
8 mA PCI Interrupt Function B. This signal, when asserted LOW,
indicates that an interrupt condition in SCSI Function B
requires service from the host. The output drive of this pin
is an open drain. Refer to
for
details about disabling this interrupt in a RAID environment.
Disabled if INT_DIR is driven LOW.
At power-up, this interrupt can be rerouted to INTA/ using
the INTA/ enable sense resistor (pull-up on MAD4). This
causes the LSI53C1010R to program the SCSI Function B
PCI
register to 0x01.
ALT_INTA/
AF7
O
8 mA PCI Alt Interrupt Function A. This signal, when asserted LOW,
indicates that an interrupting condition in SCSI Function A
requires service. The output drive of this pin is an open
drain. Refer to
for details about
disabling this interrupt in a RAID environment.
If the SCSI Function B interrupt is rerouted at power-up,
using the INTA/ enable sense resistor (pull-up on MAD4),
this signal indicates that an interrupting condition has
occurred in either SCSI Function A or SCSI Function B.
ALT_INTB/
AB9
O
8 mA PCI Alt Interrupt Function B. This signal, when asserted LOW,
indicates that an interrupting condition in SCSI Function B
requires service. The output drive of this pin is an open
drain. Refer to
for details about
disabling this interrupt in a RAID environment.
At power-up, this interrupt can be rerouted to INTA/ using
the INTA/ enable sense resistor (pull-up on MAD4). This
causes the LSI53C1010R to program the SCSI Function B
PCI
register to 0x01.
1. Refer to Register 0x4D,
in
for details on these signals.