H838024 datasheet(287/697 Pages) RENESAS

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Section 9 Timers

Rev. 7.00 Mar 10, 2005 page 245 of 652

REJ09B0042-0700

Section 9 Timers

9.1

Overview

This LSI provides six timers: timers A, C, F, G, and a watchdog timer, and an asynchronous event

counter. The functions of these timers are outlined in table 9.1.

Table 9.1

Timer Functions

Name

Functions

Internal Clock

Event

Input Pin

Waveform

Output Pin

Remarks

Timer A

•

8-bit timer

——

•

Interval function

φ/8 to φ/8192

(8 choices)

•

Time base

φw/128 (choice of 4

overflow periods)

Timer C

•

8-bit timer

•

Interval function

•

Event counting function

•

Up-count/down-count

selectable

φ/4 to φ/8192, φ

W/4

(7 choices)

TMIC

—

Up-count/

down-count

controllable by

software or

hardware

Timer F

•

16-bit timer

•

Event counting function

•

Also usable as two

independent 8-bit timers

•

Output compare output

function

φ/4 to φ/32, φw/4

(4 choices)

TMIF

TMOFL

TMOFH

Timer G

•

8-bit timer

•

Input capture function

•

Interval function

φ/2 to φ/64, φ

W/4

(4 choices)

TMIG

—

Counter

clearing option

Built-in capture

input signal

noise canceler

Watchdog

timer*

•

Reset signal generated

when 8-bit counter

overflows

φ/8192

W/32

—

H8/38024,

H8/38024S,

H8/38024R

Group

φ/64 to φ/8192

W/32

On-chip

oscillator

H8/38124

Group

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