PIC18F2480 MICROCHIP [Microchip Technology], PIC18F2480 Datasheet - Page 166

• Manufacturer Part Number: PIC18F2480
• Description: 28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F2480/2580/4480/4580
15.1
Each Capture/Compare/PWM module is associated
with a control register (generically, CCPxCON) and a
data register (CCPRx). The data register, in turn, is
comprised of two 8-bit registers: CCPRxL (low byte)
and CCPRxH (high byte). All registers are both
readable and writable.
15.1.1
The CCP modules utilize Timers 1, 2 or 3, depending
on the mode selected. Timer1 and Timer3 are available
to modules in Capture or Compare modes, while
Timer2 is available for modules in PWM mode.
TABLE 15-2:
DS39637A-page 164
CCP1 Mode ECCP1 Mode
Note 1:
Compare
Compare
Compare
Capture
Capture
Capture
PWM
PWM
PWM
(1)
(1)
(1)
CCP Module Configuration
Includes standard and Enhanced PWM operation.
CCP MODULES AND TIMER
RESOURCES
Compare
Compare
Compare
Capture
Capture
Capture
PWM
PWM
INTERACTIONS BETWEEN CCP1 AND ECCP1 FOR TIMER RESOURCES
PWM
(1)
(1)
Each module can use TMR1 or TMR3 as the time base. Time base can be different for
each CCP.
CCP1 can be configured for the special event trigger to reset TMR1 or TMR3
(depending upon which time base is used). Automatic A/D conversions on trigger event
can also be done. Operation of CCP1 could be affected if it is using the same timer as a
time base.
CCP1 can be configured for the special event trigger to reset TMR1 or TMR3
(depending upon which time base is used). Operation of CCP1 could be affected if it is
using the same timer as a time base.
Either module can be configured for the special event trigger to reset the time base.
Automatic A/D conversions on ECCP1 trigger event can be done. Conflicts may occur if
both modules are using the same time base.
None
None
None
None
Both PWMs will have the same frequency and update rate (TMR2 interrupt).
Preliminary
TABLE 15-1:
The assignment of a particular timer to a module is
determined by the Timer-to-CCP enable bits in the
T3CON register (Register 14-1). Both modules may be
active at any given time and may share the same timer
resource if they are configured to operate in the same
mode (Capture/Compare or PWM) at the same time.
The interactions between the two modules are
summarized in Figure 15-1 and Figure 15-2.
CCP/ECCP Mode
Interaction
Compare
Capture
PWM
CCP MODE – TIMER
RESOURCE
 2004 Microchip Technology Inc.
Timer Resource
Timer1 or Timer3
Timer1 or Timer3
Timer2