STM32F103CBT7TR datasheet(16/92 Pages) STMICROELECTRONICS

16 / 92 page

Description

STM32F103x8, STM32F103xB

16/92

Doc ID 13587 Rev 11

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 general-purpose 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%).

In debug mode, the advanced-control timer counter can be frozen and the PWM outputs

disabled to turn off any power switch driven by these outputs.

Many features are shared with those of the general-purpose 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 three synchronizable general-purpose timers embedded in the

STM32F103xx performance 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 12 input

captures/output compares/PWMs on the largest packages.

The general-purpose timers can work together with the advanced-control timer 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. They 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.

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 of 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.

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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