ST STM32L4+ Series Reference Manual page 355

RM0432
Bits 31:16 Reserved, must be kept at reset value.
Bits 15:12 EXTI3[3:0]: EXTI 3 configuration bits
Bits 11:8 EXTI2[3:0]: EXTI 2 configuration bits
These bits are written by software to select the source input for the EXTI3
external interrupt.
0000: PA[3] pin
0001: PB[3] pin
0010: PC[3] pin
0011: PD[3] pin
0100: PE[3] pin
0101: PF[3] pin
0110: PG[3] pin
0111: PH[3] pin
1000: PI[3] pin
These bits are written by software to select the source input for the EXTI2
external interrupt.
0000: PA[2] pin
0001: PB[2] pin
0010: PC[2] pin
0011: PD[2] pin
0100: PE[2] pin
0101: PF[2] pin
0110: PG[2] pin
0111: PH[2] pin
1000: PI[2] pin
Bits 7:4 EXTI1[3:0]: EXTI 1 configuration bits
These bits are written by software to select the source input for the EXTI1
external interrupt.
0000: PA[1] pin
0001: PB[1] pin
0010: PC[1] pin
0011: PD[1] pin
0100: PE[1] pin
0101: PF[1] pin
0110: PG[1] pin
0111: PH[1] pin
1000: PI[1] pin
Bits 3:0 EXTI0[3:0]: EXTI 0 configuration bits
These bits are written by software to select the source input for the EXTI0
external interrupt.
0000: PA[0] pin
0001: PB[0] pin
0010: PC[0] pin
0011: PD[0] pin
0100: PE[0] pin
0101: PF[0] pin
0110: PG[0] pin
0111: PH[0] pin
1000: PI[0] pin
System configuration controller (SYSCFG)
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