STM32U073RCT3 datasheet(22/146 Pages) STMICROELECTRONICS

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3.24.1

Advanced-control timer (TIM1)

The advanced-control timer can be seen as a three-phase PWM unit multiplexed on 6 channels. It has

complementary PWM outputs with programmable inserted dead-times. It can also be seen as a complete general-

purpose timer. The four independent channels can be used for:

•

Input capture

•

Output compare

•

PWM output (edge or center-aligned modes) with full modulation capability (0-100%)

•

One-pulse mode output

In debug mode, the advanced-control timer counter can be frozen and the PWM outputs disabled, so as to turn off

any power switches driven by these outputs.

Many features are shared with those of the general-purpose TIMx timers (described in Section 3.24.2: General-

purpose timers (TIM2, 3, 15, 16)) using the same architecture, so the advanced-control timers can work together

with the TIMx timers via the Timer Link feature for synchronization or event chaining.

3.24.2

General-purpose timers (TIM2, 3, 15, 16)

There are four synchronizable general-purpose timers embedded in the device (refer to Table 7 for comparison).

Each general-purpose timer can be used to generate PWM outputs or act as a simple timebase.

•

TIM2, TIM3

These are full-featured general-purpose timers:

–

TIM2 with 32-bit auto-reload up/downcounter and 16-bit prescaler

–

TIM3 with 16-bit auto-reload up/downcounter and 16-bit prescaler

They have four independent channels for input capture/output compare, PWM, or onepulse mode output.

They can operate together or in combination with other general-purpose timers via the Timer Link feature

for synchronization or event chaining. They can generate independent DMA request and support

quadrature encoders. Their counters can be frozen in debug mode.

•

TIM15, TIM16

These are general-purpose timers featuring:

–

16-bit auto-reload upcounter and 16-bit prescaler

–

2 channels and 1 complementary channel for TIM15

–

1 channel and 1 complementary channel for TIM16

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

can operate together via the Timer Link feature for synchronization or event chaining. They can generate

independent DMA request. Their counters can be frozen in debug mode.

3.24.3

Basic timers (TIM6 and TIM7)

These timers are mainly used for triggering DAC conversions. They can also be used as generic 16-bit

timebases.

3.24.4

Low-power timers (LPTIM1, LPTIM2, and LPTIM3)

These timers have an independent clock. When fed with LSE, LSI or external clock, they keep running in Stop

mode and they can wake up the system from it.

Features of LPTIM1, LPTIM2, and LPTIM3:

•

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: LSE, LSI, HSI16 or APB clocks

–

External: over LPTIM input (working even with no internal clock source running, used by pulse

counter application)

•

Programmable digital glitch filter

•

Encoder mode

STM32U073x8/B/C

Functional overview

DS14548 - Rev 2

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