PIC18F87K90 Datasheet, PDF (245/566 Pages) Microchip Technology – 64/80-Pin, High-Performance Microcontrollers with LCD Driver and nanoWatt XLP Technology

PIC18F87K90 FAMILY
TABLE 18-5: REGISTERS ASSOCIATED WITH CAPTURE, COMPARE, TIMER1/3/5/7 (CONTINUED)
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Reset
Values
on Page:
CCP6CON
—
—
DC6B1 DC6B0 CCP6M3 CCP6M2 CCP6M1 CCP6M0 80
CCP7CON
—
—
DC7B1 DC7B0 CCP7M3 CCP7M2 CCP7M1 CCP7M0 80
CCP8CON
—
CCP9CON⁽¹⁾
—
CCP10CON⁽¹⁾
—
—
DC8B1 DC8B0 CCP8M3 CCP8M2 CCP8M1 CCP8M0 78
—
DC9B1 DC9B0 CCP9M3 CCP9M2 CCP9M1 CCP9M0 78
—
DC10B1 DC10B0 CCP10M3 CCP10M2 CCP10M1 CCP10M0 79
CCPTMRS1 C7TSEL1 C7TSEL0 — C6TSEL0
—
C5TSEL0 C4TSEL1 C4TSEL0 79
CCPTMRS2
—
—
— C10TSEL0 —
C9TSEL0 C8TSEL1 C8TSEL0 79
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by Capture/Compare or Timer1/3/5/7.
Note 1: Unimplemented on devices with a program memory of 32 Kbytes (PIC18FX5K90).
18.4 PWM Mode
In Pulse-Width Modulation (PWM) mode, the CCP4 pin
produces up to a 10-bit resolution PWM output. Since
the CCP4 pin is multiplexed with a PORTC or PORTE
data latch, the appropriate TRIS bit must be cleared to
make the CCP4 pin an output.
Note:
Clearing the CCP4CON register will force
the RC1 or RE7 output latch (depending
on device configuration) to the default low
level. This is not the PORTC or PORTE
I/O data latch.
Figure 18-3 shows a simplified block diagram of the
ECCP1 module in PWM mode.
For a step-by-step procedure on how to set up the CCP
module for PWM operation, see Section 18.4.3
“Setup for PWM Operation”.
FIGURE 18-3:
SIMPLIFIED PWM BLOCK
DIAGRAM
Duty Cycle Registers
CCP4CON<5:4>
CCPR4L
CCPR4H (Slave)
Comparator
TMR2
(Note 1)
R
Q
S
RC2/ECCP1
Comparator
PR2
Clear Timer,
ECCP1 Pin and
latch D.C.
TRISC<2>
Note 1:
2:
The 8-bit TMR2 value is concatenated with the 2-bit
internal Q clock, or 2 bits of the prescaler, to create
the 10-bit time base.
CCP4 and its appropriate timers are used as an
example. For details on all of the CCP modules and
their timer assignments, see Table 18-2 and
Table 18-3.
 2010 Microchip Technology Inc.
Preliminary
DS39957B-page 245