ST STM32L4+ Series Reference Manual page 227

RM0432
31 30 29
Res. Res. Res. Res.
15 14 13
PU15 PU14 PU13 PU12
rw rw rw
Bits 31:16 Reserved, must be kept at reset value.
Bits 15:0 PUy: Port B pull-up bit y (y=0..15)
When set, this bit activates the pull-up on PB[y] when APC bit is set in PWR_CR3 register.
The pull-up is not activated if the corresponding PDy bit is also set.
5.4.11 Power Port B pull-down control register (PWR_PDCRB)
Address offset: 0x2C.
Reset value: 0x0000 0000 (This register is not reset when exiting Standby modes and with
PWRRST bit in the RCC_APB1RSTR1 register)
Access: Additional APB cycles are needed to access this register vs. a standard APB
access (3 for a write and 2 for a read).
31 30 29
Res. Res. Res. Res.
15 14 13
PD15 PD14 PD13 PD12
rw rw rw
Bits 31:16 Reserved, must be kept at reset value.
Bits 15:5 PDy: Port B pull-down bit y (y=5..15)
When set, this bit activates the pull-down on PB[y] when APC bit is set in PWR_CR3 register.
Bit 4 Reserved, must be kept at reset value.
Bits 3:0 PDy: Port B pull-down bit y (y=0..3)
When set, this bit activates the pull-down on PB[y] when APC bit is set in PWR_CR3 register.
5.4.12 Power Port C pull-up control register (PWR_PUCRC)
Address offset: 0x30.
Reset value: 0x0000 0000 (This register is not reset when exiting Standby modes and with
PWRRST bit in the RCC_APB1RSTR1 register)
Access: Additional APB cycles are needed to access this register vs. a standard APB
access (3 for a write and 2 for a read).
28 27 26 25
Res. Res. Res.
12 11 10 9
PU11 PU10 PU9
rw rw rw rw
28 27 26 25
Res. Res. Res.
12 11 10 9
PD11 PD10 PD9
rw rw rw rw
24 23 22
Res. Res. Res.
8 7 6
PU8 PU7 PU6
rw rw rw
24 23 22
Res. Res. Res.
8 7 6
PD8 PD7 PD6
rw rw rw
RM0432 Rev 6
Power control (PWR)
21 20 19 18
Res. Res. Res. Res.
5 4 3 2
PU5 PU4 PU3 PU2
rw rw rw rw
21 20 19 18
Res. Res. Res. Res.
5 4 3 2
PD5 Res. PD3 PD2
rw rw rw
17 16
Res. Res.
1 0
PU1 PU0
rw rw
17 16
Res. Res.
1 0
PD1 PD0
rw rw
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