External Interrupt Configuration Register 3 (Afio_Exticr3); External Interrupt Configuration Register 4 (Afio_Exticr4) - ST STM32F100 Series Reference Manual

RM0041
7.4.5

External interrupt configuration register 3 (AFIO_EXTICR3)

Address offset: 0x10
Reset value: 0x0000
31 30 29
15 14 13
EXTI11[3:0]
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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
7.4.6

External interrupt configuration register 4 (AFIO_EXTICR4)

Address offset: 0x14
Reset value: 0x0000
31 30 29
15 14 13
EXTI15[3:0]
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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
General-purpose and alternate-function I/Os (GPIOs and AFIOs)
28 27 26 25
12 11 10 9
EXTI10[3:0]
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28 27 26 25
12 11 10 9
EXTI14[3:0]
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24 23 22
Reserved
8 7 6
EXTI9[3:0]
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24 23 22
Reserved
8 7 6
EXTI13[3:0]
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RM0041 Rev 6
21 20 19 18
5 4 3 2
EXTI8[3:0]
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21 20 19 18
5 4 3 2
EXTI12[3:0]
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17 16
1 0
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17 16
1 0
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