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STM32F410x8/B Functional overview

3.20.4 Low-power timer (LPTIM1)

The devices embed one low-power timer. This timer features an independent clock and runs

in Stop mode if it is clocked by LSE, LSI or by an external clock. It is able to wake up the

system from Stop mode.

The low-power timer main features are the following:

• 16-bit up counter with 16-bit autoreload register

• 16-bit compare register

• Configurable output: pulse, PWM

• Continuous/ one shot mode

• Selectable software/hardware input trigger

• Selectable clock source

– Internal clock sources: LSE, LSI, HSI or APB1 clock

– External clock source over LPTIM input (working even when no internal clock

source is running and used by pulse-counter applications).

• Programmable digital glitch filter

• Encoder mode

• Active in Stop mode.

3.20.5 Independent watchdog

The independent watchdog is based on a 12-bit downcounter and 8-bit prescaler. It is

clocked from an independent 32 kHz internal RC and as it operates independently from the

main clock, it can operate in Stop and Standby modes. It can be used either as a watchdog

to reset the device when a problem occurs, or as a free-running timer for application timeout

management. It is hardware- or software-configurable through the option bytes.

3.20.6 Window watchdog

The window watchdog is based on a 7-bit downcounter that can be set as free-running. It

can be used as a watchdog to reset the device when a problem occurs. It is clocked from

the main clock. It has an early warning interrupt capability and the counter can be frozen in

debug mode.

3.20.7 SysTick timer

This timer is dedicated to real-time operating systems, but could also be used as a standard

downcounter. It features:

• A 24-bit downcounter

• Autoreload capability

• Maskable system interrupt generation when the counter reaches 0

• Programmable clock source.

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