OPTION_REG datasheet(142/222 Pages) MICROCHIP

Part #	OPTION_REG

Description	Digitally Enhanced Power Analog Controller with Integrated Synchronous Driver

PDF	222 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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142 / 222 page

MCP19111

DS22331A-page 142

 2013 Microchip Technology Inc.

FIGURE 26-1:

SIMPLIFIED PWM BLOCK DIAGRAM

A PWM output (Figure 26-2) has a time base (period)

and a time that the output stays high (duty cycle). The

frequency of the PWM is the inverse of the period

(1/period).

FIGURE 26-2:

PWM OUTPUT

26.1.3

PWM PERIOD

The PWM period is specified by writing to the PR2

following equation:

EQUATION 26-3:

When TMR2 is equal to PR2, the following two events

occur on the next increment cycle:

•TMR2 is cleared

• The PWM duty cycle is latched from PWMRL into

PWMRH

CLKPIN_IN

OSC

SYSTEM

CLOCK

LATCH DATA

RESET TIMER

Comparator

TMR2

(Note 1)

PR2

PWMPHL

PWMRL

PWMRH

(SLAVE)

PWMPHH

(SLAVE)

Note 1: TIMER 2 should be clocked by FOSC (8 MHz).

Period

Duty Cycle

TMR2 = PR2 + 1

TMR2 = PWMRH

TMR2 = PR2 + 1

PWM PERIOD=[(PR2)+1] x TOSC x(T2 PRESCALE VALUE)

OPTION_REG Datasheet(PDF) 142 Page - Microchip Technology

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