PCI6421 datasheet(90/204 Pages) TI

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4−14

4.24 Interrupt Pin Register

The value read from this register is function dependent. The default value for function 0 is 01h (INTA), and the default

value for function 1 is 02h (INTB), the default value for function 2 is 03h (INTC), and the default value for function 3

is 04h (INTD). The value also depends on the values of bits 28, the tie-all bit (TIEALL), and 29, the interrupt tie bit

(INTRTIE), in the system control register (PCI offset 80h, see Section 4.29). The INTRTIE bit is compatible with

previous TI CardBus controllers, and when set to 1, ties INTB to INTA internally. The TIEALL bit ties INTA, INTB, INTC,

and INTD together internally. The internal interrupt connections set by INTRTIE and TIEALL are communicated to

host software through this standard register interface. This read-only register is described for all PCI6x21/PCI6x11

functions in Table 4−6.

PCI function 0

Bit

Name

Interrupt pin − PCI function 0

Type

Default

PCI function 1

Bit

Name

Interrupt pin − PCI function 1

Type

Default

PCI function 3

Bit

Name

Interrupt pin − PCI function 3

Type

Default

PCI function 4

Bit

Name

Interrupt pin − PCI function 4

Type

Default

PCI function 5

Bit

Name

Interrupt pin − PCI function 5

Type

Default

Interrupt pin

Offset:

3Dh

Type:

Read-only

Default:

01h (function 0), 02h (function 1), 04h (function 3), 04h (function 4), 04h (function 5)

PCI6421 Datasheet(PDF) 90 Page - Texas Instruments

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