HT68F03 datasheet(52/139 Pages) HOLTEK

52 / 139 page

HT66F03/HT66F04/HT68F03/HT68F04

Rev. 1.00

April 16, 2010

Timer Modules

- TM

One of the most fundamental functions in any

microcontroller device is the ability to control and mea-

sure time. To implement time related functions each de-

vice includes several Timer Modules, abbreviated to the

name TM. The TMs are multi-purpose timing units and

serve to provide operations such as Timer/Counter, In-

put Capture, Compare Match Output and Single Pulse

Output as well as being the functional unit for the gener-

ation of PWM signals. Each of the TMs has either two or

three individual interrupts. The addition of input and out-

put pins for each TM ensures that users are provided

with timing units with a wide and flexible range of fea-

tures.

The common features of the different TM types are de-

scribed here with more detailed information provided in

the individual Compact, Standard and Enhanced TM

sections.

Introduction

The devices contain from two to four TMs depending

upon which device is selected with each TM having a

reference name of TM0, TM1 and TM2. Each individual

TM can be categorised as a certain type, namely Com-

pact Type TM, Standard Type TM or Enhanced Type

TM. Although similar in nature, the different TM types

vary in their feature complexity. The common features to

all of the Compact, Standard and Enhanced TMs will be

described in this section, the detailed operation regard-

ing each of the TM types will be described in separate

sections. The main features and differences between

the three types of TMs are summarised in the accompa-

nying table.

Function

CTM

STM

ETM

Timer/Counter

ÖÖÖ

I/P Capture

¾Ö

Compare Match Output

ÖÖÖ

PWM Channels

Single Pulse Output

PWM Alignment

Edge

Edge & Centre

PWM Adjustment Period & Duty

Duty or Period

TM Function Summary

Each device in the series contains a specific number of either Compact Type, Standard Type and Enhanced Type TM

units which are shown in the table together with their individual reference name, TM0~TM2.

Device

TM0

TM1

TM2

HT66F03/HT68F03/HT68F04

10-bit CTM

10-bit STM

HT66F04

10-bit CTM

10-bit STM

10-bit ETM

TM Name/Type Reference

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