RM0312 datasheet(102/275 Pages) STMICROELECTRONICS

102 / 275 page

Timer overview

RM0312

102/275

DocID022352 Rev 3

Timer overview

The microcontroller has two types of TIM timers, two general purpose (TIM2/ TIM3), and

one basic timer (TIM4). They have different features but are based on a common

architecture. This makes it easier to design applications using the various timers (identical

Although the timers do not share any resources, they can be linked together and

synchronized.

This section gives a comparison of the different timer features and glossary of internal timer

signal names.

Section 17: 16-bit general purpose timer (TIM2/TIM3) contains a full description of all the

various timer modes.

16.1

Timer feature comparison

Table 31. 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

Table 32. Timer feature comparison

Timer

Counter

resol-

ution

Counter

type

Prescaler

factor

Capture/

compare

chan-

nels

Comple-

mentary

outputs

Repet-

ition

counter

External

trigger

input

External

break

input

Timer

synchr-

onization/

chaining

TIM2

& TIM3

(general

purpose

timers)

16-bit

Up/down

Any power of

2 from 1 to

128

None

Yes

TIM4

(basic

timer)

8-bit

Any power of

2 from 1 to

32768

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