MC68HC05PV8 Datasheet, PDF (147/196 Pages) Freescale Semiconductor, Inc – Techinal Data - rev 1.9

Freescale Semiconductor, Inc.
Technical Data — MC68HC(8)05PV8/A
11.1 Contents
Section 11. Pulse Width Modulator
11.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
11.3 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
11.4 Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
11.4.1 PWM Control Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
11.4.2 PWM Data Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
11.4.3 PWM Period Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
11.6 PWM During STOP Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
11.7 PWM During Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
11.8 Frame Frequency Examples. . . . . . . . . . . . . . . . . . . . . . . . . . 153
11.2 Introduction
The pulse width modulator (PWM) system has one channel. The PWM
has a programmable period of PWMPRxT = PWMPR / f_PWM, where
PWMPR is a programmable period (1... 256) and T = 1 / f_PWM can be
1/f_OSC, 1.5/f_OSC, 2/f_OSC, 3/f_OSC and so on. f_OSC is the oscillator
frequency.
MC68HC(8)05PV8/A — Rev. 1.9
Pulse Width Modulator
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Technical Data