PIC16F1508TESSQTO datasheet(265/384 Pages) MICROCHIP

265 / 384 page

 2011 Microchip Technology Inc.

Preliminary

DS41609A-page 265

PIC16(L)F1508/9

23.0 PULSE WIDTH MODULATION

(PWM) MODULE

The PWM module generates a Pulse-Width Modulated

signal determined by the duty cycle, period, and reso-

lution that are configured by the following registers:

•PR2

•T2CON

• PWMxDCH

• PWMxDCL

•PWMxCON

Figure 23-2 shows a simplified block diagram of PWM

operation.

Figure 23-1 shows a typical waveform of the PWM

signal.

For a step-by-step procedure on how to set up this

module for PWM operation, refer to Section 23.1.9

“Setup for PWM Operation using PWMx Pins”

FIGURE 23-1:

PWM OUTPUT

FIGURE 23-2:

SIMPLIFIED PWM BLOCK DIAGRAM

Period

Pulse Width

TMR2 = 0

TMR2 =

TMR2 = PR2

PWMxDCH<7:0>:PWMxDCL<7:6>

PWMxDCH

Comparator

TMR2

Comparator

PR2

(1)

Duty Cycle registers

PWMxDCL<7:6>

Clear Timer,

PWMx pin and

latch Duty Cycle

Note 1:

8-bit timer is concatenated with the two Least Significant bits of 1/FOSC adjusted by

the Timer2 prescaler to create a 10-bit time base.

Latched

(Not visible to user)

Output Polarity (PWMxPOL)

TMR2 Module

PWMxOUT

to other peripherals: CLC and CWG

PWMx

Output Enable (PWMxOE)

TRIS Control

PIC16F1508TESSQTO Datasheet(PDF) 265 Page - Microchip Technology

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