STM8S datasheet(134/467 Pages) STMICROELECTRONICS

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Timer overview

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Timer overview

The devices in the STM8S and STM8AF family may be equipped with up to three different

timer types: Advanced control (TIM1), general purpose (TIM2/TIM3/TIM5), and basic timers

(TIM4/TIM6). The timers share the same architecture, but some have additional unique

features. The common timer architecture, which includes identical register mapping and

common basic features, simplifies their use and makes it easier to design applications.

Table 33 shows the main timer characteristics.

In STM8S and STM8AF devices with TIM1, TIM5 and TIM6, the timers do not share any

resources but they can be linked together and synchronized as described in

Synchronization between TIM1, TIM5 and TIM6 timers on page 159. In STM8S and

STM8AF devices with TIM1, TIM2, TIM3 and TIM4, the timers are not linked together.

This section gives a comparison of the different timer features (Table 34), a glossary of

internal timer signal names (Table 35).

Section 17: 16-bit advanced control timer (TIM1) contains a full description of all the various

timer modes. The other timer sections (Section 18 and Section 19) are more brief and give

only specific details on each timer, its block diagram, and register description.

Table 33. Timer characteristics

Symbol

Parameter

Min

Typ

Max

Unit

tw(ICAP)in

Input capture pulse time

tMASTER

tres(TIM)

Timer resolution time

tMASTER

ResTIM

Timer resolution with 16-bit counter

bit

Timer resolution with 8-bit counter

bit

tCOUNTER

Counter clock period when internal clock is

selected

1tMASTER

tMAX_COUNT

Maximum possible count with 16-bit counter

65,536

tMASTER

Maximum possible count with 8-bit counter

256

tMASTER

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