STM32F107RB datasheet(17/103 Pages) STMICROELECTRONICS

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STM32F105xx, STM32F107xx

Description

Doc ID 15274 Rev 6

17/104

2.3.15

Timers and watchdogs

The STM32F105xx and STM32F107xx devices include an advanced-control timer, four

general-purpose timers, two basic timers, two watchdog timers and a SysTick timer.

Table 4 compares the features of the general-purpose and basic timers.

Advanced-control timer (TIM1)

The advanced control timer (TIM1) can be seen as a three-phase PWM 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 4 independent channels can be

used for:

●

Input capture

●

Output compare

●

PWM generation (edge or center-aligned modes)

●

One-pulse mode output

If configured as a standard 16-bit timer, it has the same features as the TIMx timer. If

configured as the 16-bit PWM generator, it has full modulation capability (0-100%).

The counter can be frozen in debug mode.

Many features are shared with those of the standard TIM timers which have the same

architecture. The advanced control timer can therefore work together with the TIM timers via

the Timer Link feature for synchronization or event chaining.

General-purpose timers (TIMx)

There are up to 4 synchronizable standard timers (TIM2, TIM3, TIM4 and TIM5) embedded

in the STM32F105xx and STM32F107xx connectivity line devices. These timers are based

on a 16-bit auto-reload up/down counter, a 16-bit prescaler and feature 4 independent

channels each for input capture/output compare, PWM or one pulse mode output. This

gives up to 16 input captures / output compares / PWMs on the largest packages. They can

work together with the Advanced Control timer via the Timer Link feature for synchronization

or event chaining.

The counter can be frozen in debug mode.

Table 4.

Timer feature comparison

Timer

Counter

resolution

Counter

type

Prescaler

factor

DMA request

generation

Capture/compare

channels

Complementary

outputs

TIM1

16-bit

Up,

down,

up/down

Any integer

between 1

and 65536

Yes

TIMx

(TIM2,

TIM3,

TIM4,

TIM5)

16-bit

Up,

down,

up/down

Any integer

between 1

and 65536

Yes

TIM6,

TIM7

16-bit

Any integer

between 1

and 65536

Yes

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