STM32L412R8U3PTR datasheet(41/192 Pages) STMICROELECTRONICS

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DS12469 Rev 4

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STM32L412xx

Functional overview

3.20.2

General-purpose timers (TIM2, TIM15, TIM16)

There are up to three synchronizable general-purpose timers embedded in the

STM32L412xx (see Table 10 for differences). Each general-purpose timer can be used to

generate PWM outputs, or act as a simple time base.

•

TIM2

It is a full-featured general-purpose timers:

–

TIM2 has a 32-bit auto-reload up/downcounter and 32-bit prescaler.

This timers feature 4 independent channels for input capture/output compare, PWM or

one-pulse mode output. They can work with the other general-purpose timers via the

Timer Link feature for synchronization or event chaining.

The counters can be frozen in debug mode.

All have independent DMA request generation and support quadrature encoder.

•

TIM15 and 16

They are general-purpose timers with mid-range features:

They have 16-bit auto-reload upcounters and 16-bit prescalers.

–

TIM15 has 2 channels and 1 complementary channel

–

TIM16 has 1 channel and 1 complementary channel

All channels can be used for input capture/output compare, PWM or one-pulse mode

output.

The timers can work together via the Timer Link feature for synchronization or event

chaining. The timers have independent DMA request generation.

The counters can be frozen in debug mode.

3.20.3

Basic timer (TIM6)

The basic timer can be used as generic 16-bit timebase.

3.20.4

Low-power timer (LPTIM1 and LPTIM2)

The devices embed two low-power timers. These timers have an independent clock and are

running in Stop mode if they are clocked by LSE, LSI or an external clock. They are able to

wakeup the system from Stop mode.

Both LPTIM1 and LPTIM2 are active in Stop 0, Stop 1 and Stop 2 modes.

This low-power timer supports the following features:

•

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, HSI16 or APB clock

–

External clock source over LPTIM input (working even with no internal clock

source running, used by pulse counter application).

•

Programmable digital glitch filter

•

Encoder mode (LPTIM1 only)

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