Section 19 12-Bit Pwm; Overview; Features - Hitachi H8S/2199 Hardware Manual

Single-chip microcomputer

Table of Contents

The 12-bit PWM incorporates 2 channels of the pulse pitch control method and functions as the

drum and capstan motor controller.

Two on-chip 12-bit PWM signal generators are provided to control motors. These PWMs use the

pulse-pitch control method (periodically overriding part of the output). This reduces low-

frequency components in the pulse output, enabling a quick response without increasing the clock

frequency. The pitch of the PWM signal is modified in response to error data (representing lead

or lag in relation to a preset speed and phase).

Section 19 12-Bit PWM

Rev. 1.0, 02/00, page 369 of 1141