HD6432142 datasheet(775/1177 Pages) RENESAS

Part #	HD6432142

Description	Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series

PDF	1177 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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Section 24 Clock Pulse Generator

Rev. 4.00 Sep 27, 2006 page 731 of 1130

REJ09B0327-0400

Section 24 Clock Pulse Generator

24.1

Overview

This LSI have a built-in clock pulse generator (CPG) that generates the system clock (

φ), the bus

master clock, and internal clocks.

The clock pulse generator consists of an oscillator circuit, a duty adjustment circuit, clock

selection circuit, medium-speed clock divider, bus master clock selection circuit, subclock input

circuit, and waveform shaping circuit.

24.1.1

Block Diagram

Figure 24.1 shows a block diagram of the clock pulse generator.

EXTAL

XTAL

Oscillator

Duty

adjustment

circuit

EXCL

Subclock

input circuit

Waveform

shaping

circuit

Medium-speed

clock divider

System clock

φ pin

WDT1 count clock

Internal clock

To supporting

modules

Bus master clock

To CPU, DTC

φ/2 to φ/32

SUB

Bus master

clock

selection

circuit

Clock

selection

circuit

Figure 24.1 Block Diagram of Clock Pulse Generator

HD6432142 Datasheet(PDF) 775 Page - Renesas Technology Corp

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