AN4228 datasheet(31/90 Pages) STMICROELECTRONICS

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AN4228

Peripheral migration

3.11

PWR interface

In STM32F3 series the PWR controller presents some differences vs. STM32F1 series,

these differences are summarized in the table below. However, the programming interface is

unchanged.

Table 18. PWR differences between STM32F1 and STM32F3 series

PWR

STM32F1 series

STM32F3 series

Power supplies

–VDD = 2.0 to 3.6 V: external power supply

for I/Os and the internal regulator.

Provided externally through VDD pins.

–VSSA, VDDA = 2.0 to 3.6 V: external

analog power supplies for ADC, Reset

blocks, RCs and PLL. VDDA and VSSA

must be connected to VDD and VSS,

respectively.

–VBAT = 1.8 to 3.6 V: power supply for

RTC, external clock 32 kHz oscillator and

backup registers (through power switch)

when VDD is not present.

–VDD = 2.0 to 3.6 V: external power supply for

I/Os and the internal regulator. Provided

externally through VDD pins.

–VSSA, VDDA = 2.0 to 3.6 V: external analog

power supplies for ADC, DAC, Reset blocks,

RCs and PLL. VSSA must be connected to VSS.

–VBAT = 1.65 to 3.6 V: power supply for RTC,

external clock 32 kHz oscillator and backup

registers (through power switch) when VDD is

not present.

–VSSSD, VDDSDx = 2.0 to 3.6V: external analog

power supplies for SDADCx peripherals and

some GPIOs (STM32F37xx only).

Battery backup

domain

– Backup registers

–RTC

–LSE

– PC13 to PC15 I/Os

– Backup registers

–RTC

–LSE

– RCC Backup Domain Control Register

Wake-up

sources

Standby mode

– WKUP pin rising edge

Standby mode

– WKUP1, WKUP2 or WKUP3 pin rising edge

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