PIC18F6585/8585/6680/8680
The control register for CCP1 is shown in Register 16-1.
16.0 ENHANCED CAPTURE/
COMPARE/PWM (ECCP)
MODULE
In addition to the expanded functions of the
CCP1CON register, the CCP1 module has two
additional registers associated with enhanced PWM
The CCP1 module is implemented as a standard CCP
module with enhanced PWM capabilities. These capa-
bilities allow for 2 or 4 output channels, user selectable
polarity, dead-band control, and automatic shutdown
and restart and are discussed in detail in Section 16.2
“Enhanced PWM Mode”.
operation and auto-shutdown features:
• ECCP1DEL
• ECCP1AS
REGISTER 16-1: CCP1CON REGISTER
R/W-0
P1M1
R/W-0
P1M0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
DC1B1
DC1B0
CCP1M3 CCP1M2 CCP1M1 CCP1M0
bit 0
bit 7
bit 7-6
P1M1:P1M0: Enhanced 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
DC1B1:DC1B0: PWM Duty Cycle bit 1 and bit 0
Capture mode:
Unused.
Compare mode:
Unused.
PWM mode:
These bits are the two LSbs of the 10-bit PWM duty cycle. The eight MSbs of the duty cycle are
found in CCPR1L.
bit 3-0
CCP1M3:CCP1M0: Enhanced CCP Mode Select bits
0000=Capture/Compare/PWM off (resets CCP1 module)
0001=Reserved
0010=Compare mode, toggle output on match
0011=Capture mode, CAN message time-stamp
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, initialize CCP pin low, on compare match, force CCP pin high
1001=Compare mode, initialize CCP pin high, on compare match, force CCP pin low
1010=Compare mode, generate software interrupt only, CCP pin is unaffected
1011=Compare mode, trigger special event, resets TMR1 or TMR3
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
Legend:
R = Readable bit
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
- n = Value at POR
2004 Microchip Technology Inc.
DS30491C-page 175
MICROCHIP [ MICROCHIP ]
