HD6432138SW datasheet(307/1061 Pages) RENESAS

Part #	HD6432138SW

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

PDF	1061 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

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Section 10 14-Bit PWM D/A

Rev. 4.00 Jun 06, 2006 page 253 of 1004

REJ09B0301-0400

Section 10 14-Bit PWM D/A

10.1

Overview

The H8S/2138 Group and H8S/2134 Group have an on-chip 14-bit pulse-width modulator (PWM)

with two output channels.

Each channel can be connected to an external low-pass filter to operate as a 14-bit D/A converter.

Both channels share the same counter (DACNT) and control register (DACR).

10.1.1

Features

The features of the 14-bit PWM D/A are listed below.

• The pulse is subdivided into multiple base cycles to reduce ripple.

• Two resolution settings and two base cycle settings are available

The resolution can be set equal to one or two system clock cycles. The base cycle can be set

equal to T

× 64 or T × 256, where T is the resolution.

• Four operating rates

The two resolution settings and two base cycle settings combine to give a selection of four

operating rates.

HD6432138SW Datasheet(PDF) 307 Page - Renesas Technology Corp