System configuration controller (SYSCFG) RM0351
312/1830 DocID024597 Rev 5
9.2.3 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
EXTI3[3:0] EXTI2[3:0] EXTI1[3:0] EXTI0[3:0]
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
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