W90N740CD WINBOND [Winbond], W90N740CD Datasheet - Page 164

• Manufacturer Part Number: W90N740CD
• Description: 32-Bit ARM7TDMI-Based Micro-Controller
• Manufacturer: WINBOND [Winbond]

AIC IRQ Priority Encoding Register (AIC_IPER)
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
RESERVED
REGISTER
AIC_IPER
31
23
15
0
0
0
7
0xFFF8.210C
ADDRESS
30
22
14
0
0
0
6
29
21
13
0
0
0
5
R/W
R
Interrupt Priority Encoding Register
VECTOR
28
20
12
0
0
0
4
- 161 -
W90N740CD/W90N740CDG
DESCRIPTION
27
19
11
0
0
0
3
Publication Release Date: September. 19, 2005
26
18
10
0
0
0
2
25
17
0
0
9
0
1
0
RESET VALUE
0x0000.0000
Revision A7
24
16
0
0
8
0
0
0