Microchip Technology ARD00385 Data Sheet
2009-2011 Microchip Technology Inc.
DS39957D-page 241
PIC18F87K90 FAMILY
18.1
CCP Module Configuration
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.
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.
18.1.1
CCP MODULES AND TIMER
RESOURCES
RESOURCES
The CCP modules utilize Timers, 1 through 8, which
varies with the selected mode. Various timers are avail-
able to the CCP modules in Capture, Compare or PWM
modes, as shown in
varies with the selected mode. Various timers are avail-
able to the CCP modules in Capture, Compare or PWM
modes, as shown in
TABLE 18-1:
CCP MODE – TIMER
RESOURCE
RESOURCE
The assignment of a particular timer to a module is
determined by the Timer to CCP enable bits in the
CCPTMRSx registers (see
determined by the Timer to CCP enable bits in the
CCPTMRSx registers (see
and
). All of the modules may be active at
once 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 CCPTMRS1 register selects the timers for CCP
modules, 7, 6, 5 and 4, and the CCPTMRS2 register
selects the timers for CCP modules, 10, 9 and 8. The
possible configurations are shown in
are configured to operate in the same mode
(Capture/Compare or PWM) at the same time.
The CCPTMRS1 register selects the timers for CCP
modules, 7, 6, 5 and 4, and the CCPTMRS2 register
selects the timers for CCP modules, 10, 9 and 8. The
possible configurations are shown in
and
TABLE 18-2:
TIMER ASSIGNMENTS FOR CCP MODULES 4, 5, 6 AND 7
TABLE 18-3:
TIMER ASSIGNMENTS FOR CCP MODULES 8, 9 AND 10
CCP Mode
Timer Resource
Capture
Timer1, Timer3, Timer 5 or Timer7
Compare
PWM
Timer2, Timer4, Timer 6 or Timer8
CCPTMRS1 Register
CCP4
CCP5
CCP6
CCP7
C4TSEL
<1:0>
Capture/
Compare
Mode
PWM
Mode
C5TSEL0
Capture/
Compare
Mode
PWM
Mode
C6TSEL0
Capture/
Compare
Mode
PWM
Mode
C7TSEL
<1:0>
Capture/
Compare
Mode
PWM
Mode
0 0
TMR1
TMR2
0
TMR1
TMR2
0
TMR1
TMR2
0 0
TMR1
TMR2
0 1
TMR3
TMR4
1
TMR5
TMR4
1
TMR5
TMR2
0 1
TMR5
TMR4
1 0
TMR3
TMR6
1 0
TMR5
TMR6
1 1
Reserved
1 1
TMR5
TMR8
Note 1:
Do not use the reserved bits.
CCPTMRS2 Register
CCP8
CCP8
Devices with 32 Kbytes
CCP9
CCP10
(
)
C8TSEL
<1:0>
Capture/
Compare
Mode
PWM
Mode
C8TSEL
<1:0>
Capture/
Compare
Mode
PWM
Mode
C9TSEL0
Capture/
Compare
Mode
PWM
Mode
C10TSEL0
Capture/
Compare
Mode
PWM
Mode
0 0
TMR1
TMR2
0 0
TMR1
TMR2
0
TMR1
TMR2
0
TMR1
TMR2
0 1
TMR7
TMR4
0 1
TMR1
TMR4
1
TMR7
TMR4
1
TMR7
TMR2
1 0
TMR7
TMR6
1 0
TMR1
TMR6
1 1
Reserved
(
)
1 1
Reserved
Note 1:
The module is not available for devices with 32 Kbytes of program memory.
2:
Do not use the reserved bits.