ST STM32L4x6 User Manual

System configuration controller (SYSCFG) RM0351
276/1693 DocID024597 Rev 3
8.2.3 SYSCFG external interrupt configuration register 1
(SYSCFG_EXTICR1)
Address offset: 0x08
Reset value: 0x0000 0000
Bit 8 BOOSTEN: I/O analog switch voltage booster enable
0: I/O analog switches are supplied by V
DDA
voltage. This is the recommended configuration
when using the ADC in high V
DDA
voltage operation.
1: I/O analog switches are supplied by a dedicated voltage booster (supplied by V
DD
). This is
the recommended configuration when using the ADC in low V
DDA
voltage operation.
Bits 7:1 Reserved, must be kept at reset value.
Bit 0 FWDIS: Firewall disable
This bit is cleared by software to protect the access to the memory segments according to
the Firewall configuration. Once enabled, the firewall cannot be disabled by software. Only a
system reset set the bit.
0 : Firewall protection enabled
1 : Firewall protection disabled
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res Res Res Res Res Res Res Res Res Res Res Res Res Res Res Res
1514131211109876543210
Res EXTI3[2:0] Res EXTI2[2:0] Res EXTI1[2:0] Res EXTI0[2:0]
rw rw rw rw rw rw rw rw rw rw rw rw
Bits 31:15 Reserved, must be kept at reset value.
Bits 14:12 EXTI3[2:0]: EXTI 3 configuration bits
These bits are written by software to select the source input for the EXTI3
external interrupt.
000: PA[3] pin
001: PB[3] pin
010: PC[3] pin
011: PD[3] pin
100: PE[3] pin
101: PF[3] pin
110: PG[3] pin
111: Reserved
Bit 11 Reserved, must be kept at reset value.

ST STM32L4x6 Specifications

General

Brand	ST
Model	STM32L4x6
Category	Microcontrollers
Language	English