STM32C011F6U6 datasheet(14/94 Pages) STMICROELECTRONICS

14 / 94 page

Functional overview

STM32C011x4/x6

14/94

DS13866 Rev 3

Figure 2. Power supply overview

3.7.2

Power supply supervisor

The device has an integrated power-on/power-down (POR/PDR) reset active in all power

modes except Shutdown and ensuring proper operation upon power-on and power-down. It

maintains the device in reset when the supply voltage is below VPOR/PDR threshold, without

the need for an external reset circuit. Brownout reset (BOR) function allows extra flexibility. It

can be enabled and configured through option bytes, by selecting one of four thresholds for

rising VDD and other four for falling VDD.

3.7.3

Voltage regulator

An embedded linear voltage regulator supplies most of the digital circuitry in the device.

In Standby and Shutdown modes, the regulator is powered down and its output set in high-

impedance state, such as to bring its current consumption close to zero.

3.7.4

Low-power modes

By default, the device is in Run mode after system or power reset. It is up to the user to

select one of the low-power modes described below:

•

Sleep mode

In Sleep mode, only the CPU is stopped. All peripherals continue to operate and can

wake up the CPU when an interrupt/event occurs.

•

Stop mode

In Stop mode, the device achieves the lowest power consumption while retaining the

SRAM and register contents. All clocks in the VCORE are stopped. The HSE and HSI48

VDDA domain

RTC domain

A/D converter

Standby circuitry

(Wakeup logic,

IWDG)

Voltage regulator

Core

SRAM

Digital

peripherals

LSE 32KHz

RCC BDCR register

RTC

I/O ring

VCORE domain

Temp. sensor

Reset block

HSI48

Flash memory

VDDIO1

VDD domain

VCORE

VSS

VDD

VDDA

VREF+

VSSA

VSS

VDD

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