HC705CT4GRSSLASHD datasheet(95/152 Pages) NXP

номер детали	HC705CT4GRS/D

подробное описание детали	General Release Specification

PDF	152 Pages

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производитель	NXP [NXP Semiconductors]

домашняя страница	http://www.nxp.com

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Pulse Width Modulator (PWM)

Functional Description

MC68HC705CT4 — Rev. 2.0

General Release Specification

MOTOROLA

Pulse Width Modulator (PWM)

12.3 Functional Description

A $00 in the PWM data register yields an off output (0%), but a $3F

yields a duty of 63/64 (98.4%).

When not in use, the PWM system can be shut off to save power by

clearing the PWME bit in MISCR.

Writes to the PWM data register can be performed at any time without

affecting the current PWM output signal. Updates on the PWM output

occur at the end of the PWM period (E x 64). At this time, the new value

is loaded into the PWM data register. If a write to the registers is

performed while the PWM is disabled, data is transferred directly to the

PWM register. A read of the data register reads the active count in

progress, not the buffered value.

After the PWM is enabled (PWM = 1) the PWM output remains low for

one E cycle. This allows synchronization and will not occur again until

the next time the PWM is enabled.

Figure 12-2. PWM Waveforms

64 x E

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

HC705CT4GRS/D датащи(PDF) 95 Page - NXP Semiconductors