STM32F334X4 datasheet(24/115 Pages) STMICROELECTRONICS

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Functional overview

STM32F334x4 STM32F334x6 STM32F334x8

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DocID025409 Rev 5

3.14.3

General-purpose timers (TIM2, TIM3, TIM15, TIM16, TIM17)

There are up to three general-purpose timers embedded in the STM32F334x4/6/8 (see

Table 5 for differences), that can be synchronized. Each general-purpose timer can be used

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

•

TIM2 and TIM3

They are full-featured general-purpose timers:

–

TIM2 has a 32-bit auto-reload up/down counter and 32-bit prescaler

–

TIM3 has a 16-bit auto-reload up/down counter and 16-bit prescaler

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

or one-pulse mode output. They can work together, or 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 encoders.

•

TIM15, 16 and 17

These three timers 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 and TIM17 have 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.

3.14.4

Basic timers (TIM6 and TIM7)

The basic timers are mainly used for DAC trigger generation. They can also be used as

generic 16-bit timebases.

3.14.5

Independent watchdog

The independent watchdog is based on a 12-bit downcounter and 8-bit prescaler. It is

clocked from an independent 40 kHz internal RC and as it operates independently from the

main clock, it can operate in Stop and Standby modes. It can be used either as a watchdog

to reset the device when a problem occurs, or as a free running timer for application timeout

management. It is hardware or software configurable through the option bytes. The counter

can be frozen in debug mode.

3.14.6

Window watchdog

The window watchdog is based on a 7-bit downcounter that can be set as free running. It

can be used as a watchdog to reset the device when a problem occurs. It is clocked from

the main clock. It has an early warning interrupt capability and the counter can be frozen in

debug mode.

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