HC705CT4GRSSLASHD datasheet(97/152 Pages) NXP

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Pulse Width Modulator (PWM)

PWM During Wait Mode

MC68HC705CT4 — Rev. 2.0

General Release Specification

MOTOROLA

Pulse Width Modulator (PWM)

12.5 PWM During Wait Mode

The PWM continues normal operation during wait mode. To decrease

power consumption during WAIT, it is recommended that the PWME bit

in the miscellaneous control register be cleared if the PWM D/A

converter is not being used.

12.6 PWM During Stop Mode

In stop mode, the oscillator is stopped, causing the PWM to cease

function. Any signal in process is halted in whatever phase the signal

happens to be in. Disabling the PWM before executing the STOP

instruction is recommended.

12.7 PWM During Reset

Upon reset the PWME bit is cleared. In effect, this disables the PWM

system and configures the PC7/PWM pin as a high impedance port C

input pin. The user should write to the data register prior to enabling the

PWM system (for instance, prior to setting PWME). This avoids an

erroneous duty cycle from being driven.

12.8 PWM Power Supply Source

The PWM is supplied by VDD and VSS, due to the noise generated by the

digital circuitry, since this module is not affected by supply noise.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

HC705CT4GRS/D 데이터시트(PDF) 97 Page - NXP Semiconductors