Avago Technologies LSI53C895A - Manual (Page 97)

PCI Bus Interface Signals 3-9
3.3.6 Interrupt Signals
Table 3.7 describes the Interrupt signals.
Table 3.7 Interrupt Signals
Name PQFP BGA Pos Type Strength Description
IRQ/ 59 U20 O 8 mA PCI Interrupt Request. This signal,
when asserted LOW, indicates that
an interrupting condition has
occurred and that service is required
from the host CPU. The output drive
of this pin is open drain.
ALT_IRQ/ 1 Y2 O 8 mA PCI Alt Interrupt Request. When
asserted LOW, it indicates that an
interrupting condition has occurred
and that service is required from the
host CPU. The output drive of this
pin is open drain.
1. See Register 0x4D, SCSI Test One (STEST1) in Chapter 4 for additional information on these
signals.