Power Port B Pull-Down Control Register (Pwr_Pdcrb); Power Port C Pull-Up Control Register (Pwr_Pucrc) - ST STM32L4x6 Reference Manual

Power control (PWR)
15 14 13 12
PU15 PU14 PU13 PU12
rw 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 28
Res. Res. Res. Res.
15 14 13 12
PD15 PD14 PD13 PD12
rw 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).
31 30 29 28
Res. Res. Res. Res.
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11 10 9 8
PU11 PU10 PU9 PU8
rw rw rw rw
27 26 25 24
Res. Res. Res. Res.
11 10 9 8
PD11 PD10 PD9 PD8
rw rw rw rw
27 26 25 24
Res. Res. Res. Res.
DocID024597 Rev 3
7 6 5 4
PU7 PU6 PU5 PU4
rw rw rw rw
23 22 21 20
Res. Res. Res. Res.
7 6 5 4
PD7 PD6 PD5 Res.
rw rw rw
23 22 21 20
Res. Res. Res. Res.
RM0351
3 2 1 0
PU3 PU2 PU1 PU0
rw rw rw rw
19 18 17 16
Res. Res. Res. Res.
3 2 1 0
PD3 PD2 PD1 PD0
rw rw rw rw
19 18 17 16
Res. Res. Res. Res.