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General-purpose and alternate-function I/Os (GPIOs and AFIOs)
RM0008
8.4.5
External interrupt configuration register 3 (AFIO_EXTICR3)
Address offset: 0x10
Reset value: 0x0000
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
EXTI11[3:0]
EXTI10[3:0]
EXTI9[3:0]
EXTI8[3:0]
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
Bits 31:16
Reserved
Bits 15:0 EXTIx[3:0] : EXTI x configuration (x= 8 to 11)
These bits are written by software to select the source input for EXTIx external interrupt.
0000: PA[x] pin
0001: PB[x] pin
0010: PC[x] pin
0011: PD[x] pin
0100: PE[x] pin
0101: PF[x] pin
0110: PG[x] pin
8.4.6
External interrupt configuration register 4 (AFIO_EXTICR4)
Address offset: 0x14
Reset value: 0x0000
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
EXTI15[3:0]
EXTI14[3:0]
EXTI13[3:0]
EXTI12[3:0]
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
Bits 31:16
Reserved
Bits 15:0 EXTIx[3:0] : EXTI x configuration (x= 12 to 15)
These bits are written by software to select the source input for EXTIx external interrupt.
0000: PA[x] pin
0001: PB[x] pin
0010: PC[x] pin
0011: PD[x] pin
0100: PE[x] pin
0101: PF[x] pin
0110: PG[x] pin
166/995
Doc ID 13902 Rev 9
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