ST STM32F301 6 Series Reference Manual page 148

System configuration controller (SYSCFG)
Bits 31:16 Reserved, must be kept at reset value.
Bits 15:12 EXTI7[3:0]: EXTI 7 configuration bits
Bits 11:8 EXTI6[3:0]: EXTI 6 configuration bits
Note: Some of the I/O pins mentioned in the above register may not be available on small
packages.
9.1.4 SYSCFG external interrupt configuration register 3
(SYSCFG_EXTICR3)
Address offset: 0x10
Reset value: 0x0000
31 30 29
Res. Res. Res. Res.
15 14 13
EXTI11[3:0]
rw rw rw
Bits 31:16 Reserved, must be kept at reset value.
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These bits are written by software to select the source input for the EXTI7 external
interrupt.
x000: PA[7] pin
x001: PB[7] pin
x010: PC[7] pin
Other configurations: reserved
These bits are written by software to select the source input for the EXTI6 external
interrupt.
x000: PA[6] pin
x001: PB[6] pin
x010: PC[6] pin
Other configurations: reserved
Bits 7:4 EXTI5[3:0]: EXTI 5 configuration bits
These bits are written by software to select the source input for the EXTI5 external
interrupt.
x000: PA[5] pin
x001: PB[5] pin
x010: PC[5] pin
Other configurations: reserved
Bits 3:0 EXTI4[3:0]: EXTI 4 configuration bits
These bits are written by software to select the source input for the EXTI4 external
interrupt.
x000: PA[4] pin
x001: PB[4] pin
x010: PC[4] pin
Other configurations: reserved
28 27 26 25
Res. Res. Res.
12 11 10 9
EXTI10[3:0]
rw rw rw rw
24 23 22
Res. Res. Res.
8 7 6
EXTI9[3:0]
rw rw rw
RM0366 Rev 5
21 20 19 18
Res. Res. Res. Res.
5 4 3 2
EXTI8[3:0]
rw rw rw rw
RM0366
17 16
Res. Res.
1 0
rw rw