PIC18F1220_07 Datasheet, PDF (122/308 Pages) Microchip Technology – 18/20/28-Pin High-Performance, Enhanced Flash Microcontrollers with 10-bit A/D and nanoWatt Technology

PIC18F1220/1320
FIGURE 15-3:
SIMPLIFIED BLOCK DIAGRAM OF THE ENHANCED PWM MODULE
Duty Cycle Registers
CCPR1L
CCP1CON<5:4>
CCPR1H (Slave)
Comparator
R
TMR2
(Note 1)
S
Comparator
PR2
Clear Timer,
set CCP1 pin and
latch D.C.
P1M1<1:0>
2
CCP1M<3:0>
4
CCP1/P1A
TRISB<3>
P1B
Q
Output
Controller
TRISB<2>
P1C
TRISB<6>
P1D
TRISB<7>
CCP1DEL
RB3/CCP1/P1A
RB2/P1B/INT2
RB6/PGC/T1OSO/T13CKI/
P1C/KBI2
RB7/PGD/T1OSI/P1D/KBI3
Note:
The 8-bit TMR2 register is concatenated with the 2-bit internal Q clock, or 2 bits of the prescaler to create the
10-bit time base.
FIGURE 15-4:
PWM OUTPUT RELATIONSHIPS (ACTIVE-HIGH STATE)
CCP1CON<7:6>
SIGNAL
0
Duty
Cycle
Period
00 (Single Output)
10 (Half-Bridge)
(Full-Bridge,
01 _Forward)
(Full-Bridge,
11
Reverse)
P1A Modulated
P1A Modulated
P1B Modulated
P1A Active
P1B Inactive
P1C Inactive
P1D Modulated
P1A Inactive
P1B Modulated
P1C Active
P1D Inactive
Delay⁽¹⁾
Delay⁽¹⁾
PR2+1
DS39605F-page 120
© 2007 Microchip Technology Inc.