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RM0453 Rev 2 263/1454

RM0453 Power control (PWR)

275

6.6.8 PWR control register 5 (PWR_CR5)

This register is not reset when exiting Standby modes.

Access: three additional APB cycles are needed to write this register versus a standard APB

write.

Address offset: 0x01C

Reset value: 0x0000 0000

Bit 2 CWUF3: Clear wakeup flag 3

Setting this bit clears the WUF3 flag in the PWR_SR1 register. This bit is always read as 0.

Bit 1 CWUF2: Clear wakeup flag 2

Setting this bit clears the WUF2 flag in the PWR_SR1 register. This bit is always read as 0.

Bit 0 CWUF1: Clear wakeup flag 1

Setting this bit clears the WUF1 flag in the PWR_SR1 register. This bit is always read as 0.

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

SMPSEN

RFEOLEN

Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res.

rw rw

Bits 31:16 Reserved, must be kept at reset value.

Bit 15 SMPSEN: SMPS step-down converter enable

This bit enables the SMPS step-down converter.

0: SMPS step-down converter SMPS mode disabled (LDO mode enabled)

1: SMPS step-down converter SMPS mode enabled

Caution: Before enabling the SMPS, the SMPS clock detection must be enabled in the sub-

GHz radio SUBGHZ_SMPSC0R.CLKDE.

Bit 14 RFEOLEN: sub-GHz radio end-of-life detector enable

0: Radio end-of-life detector disabled

1: Radio end-of-life detector enabled

Bits 13:0 Reserved, must be kept at reset value.

ST STM32WL55JC User Manual

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