User manual
...the world's most energy friendly microcontrollers
2012-04-24 - Giant Gecko Family - d0053_Rev0.96 770
www.energymicro.com
32.5.21 GPIO_CTRL - GPIO Control Register
Offset Bit Position
0x12C
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
0
Access
RW
Name
EM4RET
Bit Name Reset Access Description
31:1 Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
0 EM4RET 0 RW Enable EM4 retention
Set to enable EM4 retention of output enable, output value and pull enable.
32.5.22 GPIO_CMD - GPIO Command Register
Offset Bit Position
0x130
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
0
Access
W1
Name
EM4WUCLR
Bit Name Reset Access Description
31:1 Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
0 EM4WUCLR 0 W1 EM4 Wake-up clear
Write 1 to clear all wake-up requests.
32.5.23 GPIO_EM4WUEN - EM4 Wake-up Enable Register
Offset Bit Position
0x134
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
0x00
Access
RW
Name
EM4WUEN
Bit Name Reset Access Description
31:6 Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
5:0 EM4WUEN 0x00 RW EM4 Wake-up enable
Write 1 to enable wake-up request, write 0 to disable wake-up request.