STMicroelectronics STM32WLEx Reference Manual page 343

RM0461
Bit 8 BOOSTEN: I/O analog switch voltage booster enable
Bits 7:0 Reserved, must be kept at reset value.
9.2.3 SYSCFG external interrupt configuration register 1
(SYSCFG_EXTICR1)
Address offset: 0x008
Reset value: 0x0000 0000
31 30 29
Res. Res. Res. Res.
15 14 13
Res. EXTI3[2:0]
rw rw
Bits 31:15 Reserved, must be kept at reset value.
Bits 14:12 EXTI3[2:0]: EXTI3 configuration bits
Bit 11 Reserved, must be kept at reset value.
Bits 10:8 EXTI2[2:0]: EXTI2 configuration bits
Bit 7 Reserved, must be kept at reset value.
Bits 6:4 EXTI1[2:0]: EXTI1 configuration bits
Bit 3 Reserved, must be kept at reset value.
0: I/O analog switches are supplied by V
when using the ADC in high V
1: I/O analog switches are supplied by a dedicated voltage booster (supplied by V
the recommended configuration when using the ADC in low V
28 27 26 25
Res. Res. Res.
12 11 10 9
Res. EXTI2[2:0]
rw rw rw
These bits are written by software to select the source input for the EXTI3 external interrupt.
000: PA3 pin
001: PB3 pin
010: PC3 pin
111: PH3 pin
Others: Reserved
These bits are written by software to select the source input for the EXTI2 external interrupt.
000: PA2 pin
001: PB2 pin
010: PC2 pin
Others: Reserved
These bits are written by software to select the source input for the EXTI1 external interrupt.
000: PA1 pin
001: PB1 pin
010: PC1 pin
Others: Reserved
System configuration controller (SYSCFG)
voltage. This is the recommended configuration
DDA
voltage operation.
DDA
24 23 22
Res. Res. Res.
8 7 6
Res. EXTI1[2:0]
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RM0461 Rev 5
voltage operation.
DDA
21 20 19 18
Res. Res. Res. Res.
5 4 3 2
Res.
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). This is
DD
17 16
Res. Res.
1 0
EXTI0[2:0]
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