STM32F410RB datasheet(24/142 Pages) STMICROELECTRONICS

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Functional overview

STM32F410x8/B

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DocID028094 Rev 5

and the HSE crystal oscillators are disabled. The voltage regulator can also be put

either in normal or in low-power mode.

The RTC and the low-power timer (LPTIM1) can remain active in Stop mode. They can

consequently be used to wake up the device from this mode.

The device can be woken up from the Stop mode by any of the EXTI line (the EXTI line

source can be one of the 16 external lines, the PVD output, LPTIM1, the RTC alarm/

wakeup/ tamper/ time stamp events).

•

Standby mode

The Standby mode is used to achieve the lowest power consumption. The internal

voltage regulator is switched off so that the entire 1.2 V domain is powered off. The

PLL, the HSI RC and the HSE crystal oscillators are also switched off. After entering

Standby mode, the SRAM and register contents are lost except for registers in the

backup domain when selected.

The device exits the Standby mode when an external reset (NRST pin), an IWDG reset,

a rising edge on the WKUP pin, or an RTC alarm/ wakeup/ tamper/time stamp event

occurs.

Standby mode is not supported when the embedded voltage regulator is bypassed and

the 1.2 V domain is controlled by an external power.

3.19

VBAT operation

The VBAT pin allows to power the device VBAT domain from an external battery, an external

super-capacitor, or from VDD when no external battery and an external super-capacitor are

present.

VBAT operation is activated when VDD is not present.

The VBAT pin supplies the RTC and the backup registers.

Note:

When the microcontroller is supplied from VBAT, external interrupts and RTC alarm/events

do not exit it from VBAT operation. When PDR_ON pin is not connected to VDD (internal

Reset OFF), the VBAT functionality is no more available and VBAT pin should be connected

to VDD.

3.20

Timers and watchdogs

The devices embed one advanced-control timer, four general purpose timers, one low

power timer, two watchdog timers and one SysTick timer.

All timer counters can be frozen in debug mode.

Table 5 compares the features of the advanced-control and general-purpose timers.

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