M68HC08 datasheet(138/332 Pages) FREESCALE

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Timer Interface Module (TIM)

Technical Data

MC68HC908JB16 — Rev. 1.1

138

Timer Interface Module (TIM)

Freescale Semiconductor

10.2 Introduction

This section describes the timer interface (TIM) module. The TIM is a

two-channel timer that provides a timing reference with input capture,

output compare, and pulse-width-modulation functions. Figure 10-1 is a

block diagram of the TIM.

This particular MCU has two timer interface modules which are denoted

as TIM1 and TIM2.

NOTE:

TIM1 and TIM2 each have channel 0 and channel 1 I/Os connected

together, forming a common I/O. Because of this common I/O, both

channels should not be simultaneously configured for output compare

functions, otherwise, port pin contention will occur.

10.3 Features

Features of the TIM include:

•

Two input capture/output compare channels on one common I/O:

–

Rising-edge, falling-edge, or any-edge input capture trigger

–

Set, clear, or toggle output compare action

•

Buffered and unbuffered pulse-width-modulation (PWM) signal

generation

•

Programmable TIM clock input

–

7-frequency internal bus clock prescaler selection

–

External TIM clock input (bus frequency ÷2 maximum)

•

Free-running or modulo up-count operation

•

Toggle any channel pin on overflow

•

TIM counter stop and reset bits

M68HC08 Datasheet(PDF) 138 Page - Freescale Semiconductor, Inc