STM32WL33C8 datasheet(23/91 Pages) STMICROELECTRONICS

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3.16

General purpose timers

The STM32WL33xx embeds one general purpose timer (TIM2) supporting up to 4 independent channels, one

general purpose timer (TIM16) supporting one single channel and one complementary.

3.16.1

General Purpose timer (TIM2)

The general purpose 16-bit timer (TIM2) consists of a 16-bit auto-reload counter driven by a programmable

prescaler.

It may be used for a variety of purposes, including measuring the pulse lengths of input signals (input capture) or

generating output waveforms (output compare, PWM). Pulse lengths and waveform periods can be modulated

from a few microseconds to several milliseconds using the timer prescaler on the timer input clock which is at

32MHz.

The TIM2 main features are:

•

16-bit up, down, up/down auto-reload counter

•

16-bit programmable prescaler allowing division (also “on the fly”) the counter clock frequency either by any

factor between 1 and 65536

•

Up to 4 independent channels for:

–

input capture

–

output compare

–

PWM generation (edge and center-aligned mode)

–

one-pulse mode output

•

Synchronization circuit to control the timer with external signals and to interconnect several timers together

•

Repetition counter to update the timer registers only after a given number of cycles of the counter

•

Interrupt/DMA generation on the following events:

–

update: counter overflow/underflow, counter initialization (by software or internal/external trigger)

–

input capture

–

output comparison

–

trigger event (counter start, stop, initialization or count by internal/external trigger)

•

Supports incremental (quadrature) encoder for positioning purposes

•

Trigger input for external clock or cycle-by-cycle current management

•

The counter can be frozen in debug mode

3.16.2

General purpose timer (TIM16)

The TIM16 timer consists of a 16-bit auto-reload counter driven by a programmable prescaler. It may be used for

a variety of purposes, including measuring the pulse lengths of input signals (input capture) or generating output

waveforms (output compare, PWM, complementary PWM with dead-time insertion).

Pulse lengths and waveform periods can be modulated from a few microseconds to several milliseconds using

the timer prescaler and the RCC clock controller prescaler.

The main TIM16 features are:

•

16-bit auto-reload upcounter

•

16-bit programmable prescaler used to divide (also “on the fly”) the counter clock frequency by any factor

between 1 and 65535

•

One channel for:

–

input capture

–

output comparison

–

PWM generation (edge-aligned mode)

–

one-pulse mode output

–

trigger event (counter start, stop, initialization or count by internal/external trigger)

•

Complementary output with programmable dead-time

•

Synchronization circuit to control the timer with external signals and to interconnect several timers together

•

Repetition counter to update the timer registers only after a given number of cycles of the counter

•

Break input to put the timer’s output signals in the reset state or a known state

STM32WL33xx

Functional overview

DS14221 - Rev 5

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