Rev. 1.0, 02/00, page 369 of 1141
Section 19 12-Bit PWM
19.1
Overview
The 12-bit PWM incorporates 2 channels of the pulse pitch control method and functions as the
drum and capstan motor controller.
19.1.1
Features
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).