PIC16F716
8.0
ENHANCED CAPTURE/
COMPARE/PWM MODULE
Note:
CCPR1 and CCP1 throughout this
document refer to CCPR1 or CCPR2 and
CCP1 or CCP2, respectively.
The Enhanced Capture/Compare/PWM module is a
peripheral which allows the user to time and control
different events. In Capture mode, the peripheral
allows the timing of the duration of an event. The
Compare mode allows the user to trigger an external
event when a predetermined amount of time has
expired. The PWM mode can generate a Pulse-Width
Modulated signal of varying frequency and duty cycle.
TABLE 8-1:
ECCP MODE – TIMER
RESOURCES REQUIRED
ECCP Mode
Capture
Timer Resource
Timer1
Timer1
Timer2
Compare
PWM
Table 8-1 shows the timer resources required by the
ECCP module.
REGISTER 8-1:
CCP1CON: ENHANCED CCP1 CONTROL REGISTER
R/W-0
P1M1
R/W-0
P1M0
R/W-0
R/W-0
DC1B0
R/W-0
R/W-0
R/W-0
CCP1M1
R/W-0
DC1B1
CCP1M3
CCP1M2
CCP1M0
bit 7
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
bit 7-6
P1M<1:0>: PWM Output Configuration bits
If CCP1M<3:2> = 00, 01, 10:
xx= P1A assigned as Capture/Compare input; P1B, P1C, P1D assigned as port pins
If CCP1M<3:2> = 11:
00= Single output; P1A modulated; P1B, P1C, P1D assigned as port pins
01= Full-Bridge output forward; P1D modulated; P1A active; P1B, P1C inactive
10= Half-Bridge output; P1A, P1B modulated with dead-band control; P1C, P1D assigned as port pins
11= Full-Bridge output reverse; P1B modulated; P1C active; P1A, P1D inactive
bit 5-4
DC1B<1:0>: PWM Duty Cycle Least Significant bits
Capture mode:
Unused.
Compare mode:
Unused.
PWM mode:
These bits are the two LSbs of the PWM duty cycle. The eight MSbs are found in CCPR1L.
bit 3-0
CCP1M<3:0>: ECCP Mode Select bits
0000= Capture/Compare/PWM off (resets ECCP module)
0001= Unused (reserved)
0010= Compare mode, toggle output on match (CCP1IF bit is set)
0011= Unused (reserved)
0100= Capture mode, every falling edge
0101= Capture mode, every rising edge
0110= Capture mode, every 4th rising edge
0111= Capture mode, every 16th rising edge
1000= Compare mode, set output on match (CCP1IF bit is set)
1001= Compare mode, clear output on match (CCP1IF bit is set)
1010= Compare mode, generate software interrupt on match (CCP1IF bit is set, CCP1 pin is
unaffected)
1011= Compare mode, Special Event Trigger (CCP1IF bit is set; CCP1 resets TMR1 or TMR2)
1100= PWM mode; P1A, P1C active-high; P1B, P1D active-high
1101= PWM mode; P1A, P1C active-high; P1B, P1D active-low
1110= PWM mode; P1A, P1C active-low; P1B, P1D active-high
1111= PWM mode; P1A, P1C active-low; P1B, P1D active-low
© 2007 Microchip Technology Inc.
DS41206B-page 47
MICROCHIP [ MICROCHIP ]
