STM32L100RC datasheet(26/106 Pages) STMICROELECTRONICS

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Functional overview

STM32L100RC

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DocID024995 Rev 5

3.14

Timers and watchdogs

The ultra-low-power STM32L100RC device includes seven general-purpose timers, two

basic timers, and two watchdog timers.

Table 5 compares the features of the general-purpose and basic timers.

3.14.1

General-purpose timers (TIM2, TIM3, TIM4, TIM9, TIM10 and

TIM11)

There are seven synchronizable general-purpose timers embedded in the STM32L100RC

device (see Table 5 for differences).

TIM2, TIM3, TIM4

TIM2, TIM3, TIM4 are based on 16-bit auto-reload up/down counter. They include a 16-bit

prescaler. They feature four 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.

TIM2, TIM3, TIM4 general-purpose timers can work together or with the TIM10, TIM11 and

TIM9 general-purpose timers via the Timer Link feature for synchronization or event

chaining. Their counter can be frozen in debug mode. Any of the general-purpose timers

can be used to generate PWM outputs.

TIM2, TIM3, TIM4 all have independent DMA request generation.

These timers are capable of handling quadrature (incremental) encoder signals and the

digital outputs from 1 to 3 hall-effect sensors.

TIM10, TIM11 and TIM9

TIM10 and TIM11 are based on a 16-bit auto-reload upcounter. TIM9 is based on a 16-bit

auto-reload up/down counter. They include a 16-bit prescaler. TIM10 and TIM11 feature one

independent channel, whereas TIM9 has two independent channels for input capture/output

compare, PWM or one-pulse mode output. They can be synchronized with the TIM2, TIM3,

TIM4 full-featured general-purpose timers.

Table 5. Timer feature comparison

Timer

Counter

resolution

Counter type

Prescaler factor

DMA

request

generation

Capture/compare

channels

Complementary

outputs

TIM2,

TIM3,

TIM4

16-bit

Up, down,

up/down

Any integer between

1 and 65536

Yes

TIM9

16-bit

Up, down,

up/down

Any integer between

1 and 65536

TIM10,

TIM11

16-bit

Any integer between

1 and 65536

TIM6,

TIM7

16-bit

Any integer between

1 and 65536

Yes

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