PIC18F23K22-ESLASHML datasheet(177/496 Pages) MICROCHIP

177 / 496 page

 2010 Microchip Technology Inc.

Preliminary

DS41412C-page 177

PIC18(L)F2X/4XK22

14.0 CAPTURE/COMPARE/PWM

MODULES

The Capture/Compare/PWM module is a peripheral

which allows the user to time and control different

events, and to generate Pulse-Width Modulation

(PWM) signals. In Capture mode, the peripheral allows

the timing of the duration of an event. The Compare

mode allows the user to trigger an external event when

a predetermined amount of time has expired. The

PWM mode can generate Pulse-Width Modulated

signals of varying frequency and duty cycle.

This family of devices contains three Enhanced

Capture/Compare/PWM modules (ECCP1, ECCP2,

and ECCP3) and two standard Capture/Compare/PWM

modules (CCP4 and CCP5).

The Capture and Compare functions are identical for all

CCP/ECCP modules. The difference between CCP

and ECCP modules are in the Pulse-Width Modulation

(PWM) function. In CCP modules, the standard PWM

function is identical. In ECCP modules, the Enhanced

PWM function has either Full-Bridge or Half-Bridge

PWM output. Full-Bridge ECCP modules have four

available I/O pins while Half-Bridge ECCP modules

only have two available I/O pins. ECCP PWM modules

are backward compatible with CCP PWM modules and

can be configured as standard PWM modules. See

Table 14-1 to determine the CCP/ECCP functionality

available on each device in this family.

Note 1: In devices with more than one CCP

module, it is very important to pay close

attention to the register names used. A

number placed after the module acronym

is used to distinguish between separate

modules. For example, the CCP1CON

and

CCP2CON

control

the

same

operational aspects of two completely

different CCP modules.

2: Throughout

this

section,

generic

references to a CCP module in any of its

operating modes may be interpreted as

being equally applicable to ECCP1,

ECCP2, ECCP3, CCP4 and CCP5.

and bit names may use the generic

designator ‘x’ to indicate the use of a

numeral to distinguish a particular module,

when required.

TABLE 14-1:

PWM RESOURCES

Device Name

ECCP1

ECCP2

ECCP3

CCP4

CCP5

PIC18(L)F23K22

PIC18(L)F24K22

PIC18(L)F25K22

PIC18(L)F26K22

Enhanced PWM

Full-Bridge

Enhanced PWM

Half-Bridge

Enhanced PWM

Half-Bridge

Standard PWM

(Special Event Trigger)

PIC18(L)F43K22

PIC18(L)F44K22

PIC18(L)F45K22

PIC18(L)F46K22

Enhanced PWM

Full-Bridge

Enhanced PWM

Full-Bridge

Enhanced PWM

Half-Bridge

Standard PWM

(Special Event Trigger)

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