Datasheet

4−13

4.24 Interrupt Pin Register

The value read from the interrupt pin register is function dependent and depends on the interrupt signaling mode,

selected through bits 2−1 (INTMODE field) of the device control register (PCI offset 92h, see Section 4.33) and the

state of bit 29 (INTRTIE) in the system control register (PCI offset 80h, see Section 4.29). When the INTRTIE bit is

set, this register reads 01h (INTA

) for both functions. See Table 4−6 for a complete description of the register contents.

Bit 7 6 5 4 3 2 1 0

Name Interrupt pin

Type R R R R R R R R

Default 0 0 0 0 0 0 X X

Offset: 3Dh

Type: Read-only

Default: 0Xh

Table 4−6. Interrupt Pin Register Cross-Reference

INTRTIE BIT

INTPIN

INTRTIE BIT

FUNCTION 0 FUNCTION 1

0 01h 02h

1 01h 01h