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20.1
Overview
The 12-bit PWM incorporates 2 channels of the pulse pitch control method and functions as the
drum and capstan motor controller.
20.1.1
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).
Section 20 12-Bit PWM
Rev. 2.0, 11/00, page 413 of 1037
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