User manual
...the world's most energy friendly microcontrollers
2012-04-24 - Giant Gecko Family - d0053_Rev0.96 766
www.energymicro.com
Bit Name Reset Access Description
Set bit n to enable triggering of external interrupt n on falling edge.
Value Description
EXTIFALL[n] = 0 Falling edge trigger disabled
EXTIFALL[n] = 1 Falling edge trigger enabled
32.5.14 GPIO_IEN - Interrupt Enable Register
Offset Bit Position
0x110
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reset
0x0000
Access
RW
Name
EXT
Bit Name Reset Access Description
31:16 Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
15:0 EXT 0x0000 RW External Interrupt n Enable
Set bit n to enable external interrupt from pin n.
Value Description
EXT[n] = 0 Pin n external interrupt disabled
EXT[n] = 1 Pin n external interrupt enabled
32.5.15 GPIO_IF - Interrupt Flag Register
Offset Bit Position
0x114
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reset
0x0000
Access
R
Name
EXT
Bit Name Reset Access Description
31:16 Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
15:0 EXT 0x0000 R External Interrupt Flag n
Pin n external interrupt flag.
Value Description
EXT[n] = 0 Pin n external interrupt flag cleared