GigaDevice Semiconductor GD32F3x0 - Alternate Function Selected Register 1 (Gpiox_Afsel1, X=A,B,C)

GD32F3x0 User Manual
141
0011: AF3 selected
0100: AF4 selected (Port A,B only)
0101: AF5 selected (Port A,B only)
0110: AF6 selected (Port A,B only)
0111: AF7 selected (Port A,B only)
1000 ~ 1111: Reserved
7.4.10. Alternate function selected register 1 (GPIOx_AFSEL1, x=A,B,C)
Address offset: 0x24
Reset value: 0x0000 0000
This register can be accessed by byte(8-bit), half-word(16-bit) and word(32-bit).
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
SEL15[3:0]
SEL14[3:0]
SEL13[3:0]
SEL12[3:0]
rw
rw
rw
rw
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
SEL11[3:0]
SEL10[3:0]
SEL9[3:0]
SEL8[3:0]
rw
rw
rw
rw
Bits
Fields
Descriptions
31:28
SEL15[3:0]
Pin 15 alternate function selected
These bits are set and cleared by software.
Refer to SEL8[3:0] description
27:24
SEL14[3:0]
Pin 14 alternate function selected
These bits are set and cleared by software.
Refer to SEL8[3:0] description
23:20
SEL13[3:0]
Pin 13 alternate function selected
These bits are set and cleared by software.
Refer to SEL8[3:0] description
19:16
SEL12[3:0]
Pin 12 alternate function selected
These bits are set and cleared by software.
Refer to SEL8[3:0] description
15:12
SEL11[3:0]
Pin 1 alternate function selected
These bits are set and cleared by software.
Refer to SEL8[3:0] description
11:8
SEL10[3:0]
Pin 10 alternate function selected
These bits are set and cleared by software.
Refer to SEL8[3:0] description
7:4
SEL9[3:0]
Pin 9 alternate function selected