Datasheet

Functional overview STM32F410x8/B
24/142 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 V
BAT
operation
The VBAT pin allows to power the device V
BAT
domain from an external battery, an external
super-capacitor, or from V
DD
when no external battery and an external super-capacitor are
present.
V
BAT
operation is activated when V
DD
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 V
BAT
operation. When PDR_ON pin is not connected to V
DD
(internal
Reset OFF), the V
BAT
functionality is no more available and VBAT pin should be connected
to V
DD
.
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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