PIC18C658 MICROCHIP [Microchip Technology], PIC18C658 Datasheet - Page 133

• Manufacturer Part Number: PIC18C658
• Description: High-Performance Microcontrollers with CAN Module
• Manufacturer: MICROCHIP [Microchip Technology]

14.5.3
The following steps should be taken when configuring
the CCP module for PWM operation:
1.
2.
3.
4.
5.
TABLE 14-4:
TABLE 14-5:
 2000 Microchip Technology Inc.
INTCON
PIR1
PIE1
IPR1
TRISC
TMR2
PR2
T2CON
CCPR1L
CCPR1H
CCP1CON
CCPR2L
CCPR2H
CCP2CON
PIR2
PIE2
IPR2
Legend:
Timer Prescaler (1, 4, 16)
PR2 Value
Maximum Resolution (bits)
Name
Set the PWM period by writing to the PR2
register.
Set the PWM duty cycle by writing to the
CCPR1L register and CCP1CON<5:4> bits.
Make the CCP1 pin an output by clearing the
TRISC<2> bit.
Set the TMR2 prescale value and enable Timer2
by writing to T2CON.
Configure the CCP1 module for PWM operation.
SETUP FOR PWM OPERATION
x = unknown, u = unchanged, - = unimplemented, read as '0'. Shaded cells are not used by PWM and Timer2.
PWM Frequency
PORTC Data Direction Register
Timer2 module’s register
Timer2 module’s period register
Capture/Compare/PWM register1 (LSB)
Capture/Compare/PWM register1 (MSB)
Capture/Compare/PWM register2 (LSB)
Capture/Compare/PWM register2 (MSB)
PSPIF
PSPIE
PSPIP
GIEH
Bit 7
GIE/
—
—
—
—
—
—
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 40 MHz
REGISTERS ASSOCIATED WITH PWM AND TIMER2
TOUTPS3 TOUTPS2 TOUTPS1 TOUTPS0 TMR2ON T2CKPS1 T2CKPS0 -000 0000 -000 0000
PEIE/
CMIE
CMIP
ADIE
ADIP
CMIF
GIEL
ADIF
Bit 6
—
—
TMR0IE
DC1B1
DC2B1
RCIF
RCIE
RCIP
Bit 5
—
—
—
2.44 kHz
0xFF
Advanced Information
10
16
DC1B0
DC2B0
INT0IE
TXIE
TXIP
Bit 4
TXIF
—
—
—
9.76 kHz
CCP1M3
CCP2M3
0xFF
SSPIF
SSPIE
SSPIP
BCLIE
BCLIP
BCLIF
10
RBIE
Bit 3
4
39.06 kHz
CCP1M2
CCP2M2
TMR0IF
CCP1IF
CCP1IE
CCP1IP
LVDIF
LVDIE
LVDIP
Bit 2
0xFF
10
1
CCP1M1
CCP2M1
TMR2IE
TMR2IP
TMR3IE
TMR3IP
TMR2IF
TMR3IF
INT0IF
Bit 1
156.3 kHz
0x3F
1
8
CCP1M0
CCP2M0
TMR1IF
TMR1IE
TMR1IP
CCP2IE
CCP2IP
CCP2IF
RBIF
PIC18CXX8
Bit 0
312.5 kHz
0x1F
0000 000x 0000 000u
0000 0000 0000 0000
0000 0000 0000 0000
0000 0000 0000 0000
1111 1111 1111 1111
0000 0000 0000 0000
1111 1111 1111 1111
xxxx xxxx uuuu uuuu
xxxx xxxx uuuu uuuu
--00 0000 --00 0000
xxxx xxxx uuuu uuuu
xxxx xxxx uuuu uuuu
--00 0000 --00 0000
-0-- 0000 -0-- 0000
-0-- 0000 -0-- 0000
-0-- 0000 -0-- 0000
1
7
Value on
DS30475A-page 133
POR,
BOR
416.6 kHz
0x17
5.5
1
Value on
RESETS
all other