PIC18F23K22 Datasheet, PDF (177/492 Pages) Microchip Technology – 28/40/44-Pin, Low-Power, High-Performance Microcontrollers with nanoWatt XLP Technology

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.
Register names, module signals, I/O pins,
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
PIC18(L)F43K22
PIC18(L)F44K22
PIC18(L)F45K22
PIC18(L)F46K22
Enhanced PWM
Full-Bridge
Enhanced PWM
Full-Bridge
Enhanced PWM
Half-Bridge
Enhanced PWM
Half-Bridge
Standard PWM
Standard PWM
(Special Event Trigger)
Enhanced PWM
Full-Bridge
Enhanced PWM
Half-Bridge
Standard PWM
Standard PWM
(Special Event Trigger)
 2010 Microchip Technology Inc.
Preliminary
DS41412B-page 177