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Rainbow Electronics W90N745CDG User Manual

Page 311

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W90N745CD/W90N745CDG

Publication Release Date: September 22, 2006

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307

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Revision

A2

BITS

DESCRIPTIONS

[6:2]

Vector

When the AIC generates the interrupt, VECTOR represents the
interrupt channel number that is active, enabled, and has the highest
priority. If the representing interrupt channel possesses a priority level
0, then the interrupt asserted is FIQ; otherwise, it is IRQ. The value of
VECTOR is copied to the register AIC_ISNR thereafter by the AIC.
This register was restored a value 0 after it was read by the interrupt
handler. This register can help indexing into a branch table to quickly
jump to the corresponding interrupt service routine.
VECTOR [6:2]: Interrupt Vector
0 = no interrupt occurs
1 ~ 31 = representing the interrupt channel that is active, enabled, and
having the highest priority

[0]

Reserved

Reserved

AIC Interrupt Source Number Register (AIC_ISNR)

REGISTER ADDRESS R/W

DESCRIPTION

RESET

VALUE

AIC_ISNR

0xFFF8_2110

R

Interrupt Source Number Register

0x0000_0000

31

30

29

28

27

26

25

24

0 0 0 0 0 0 0 0

23

22

21

20

19

18

17

16

0 0 0 0 0 0 0 0

15

14

13

12

11

10

9

8

0 0 0 0 0 0 0 0

7

6

5

4

3

2

1

0

0

0 0

IRQID


BITS

DESCRIPTIONS

[31:5]

Reserved Reserved

[4:0]

IRQID

The purpose of this register is to record the interrupt channel number
that is active, enabled, and has the highest priority.
IRQID [4:0]: IRQ Identification
Stands for the interrupt channel number