Datasheet

PIC16(L)F1938/9
DS40001574C-page 228  2011-2013 Microchip Technology Inc.
23.5 Register Definitions: CCP Control
REGISTER 23-1: CCPxCON: CCPx CONTROL REGISTER
R/W-00 R/W-0/0 R/W-0/0 R/W-0/0 R/W-0/0 R/W-0/0 R/W-0/0 R/W-0/0
PxM<1:0>
(1)
DCxB<1:0> CCPxM<3:0>
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
u = Bit is unchanged x = Bit is unknown -n/n = Value at POR and BOR/Value at all other Reset
‘1’ = Bit is set ‘0’ = Bit is cleared
bit 7-6
PxM<1:0>: Enhanced PWM Output Configuration bits
(1)
Capture mode:
Unused
Compare mode:
Unused
I
f CCPxM<3:2> = 00, 01, 10:
xx = PxA assigned as Capture/Compare input; PxB, PxC, PxD assigned as port pins
If CCPxM<3:2> =
11:
00 = Single output; PxA modulated; PxB, PxC, PxD assigned as port pins
01 = Full-Bridge output forward; PxD modulated; PxA active; PxB, PxC inactive
10 = Half-Bridge output; PxA, PxB modulated with dead-band control; PxC, PxD assigned as port pins
11 = Full-Bridge output reverse; PxB modulated; PxC active; PxA, PxD inactive
bit 5-4
DCxB<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 CCPRxL.
bit 3-0
CCPxM<3:0>: ECCPx Mode Select bits
0000 = Capture/Compare/PWM off (resets ECCPx module)
0001 = Reserved
0010 = Compare mode: toggle output on match
0011 = 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: initialize ECCPx pin low; set output on compare match (set CCPxIF)
1001 = Compare mode: initialize ECCPx pin high; clear output on compare match (set CCPxIF)
1010 = Compare mode: generate software interrupt only; ECCPx pin reverts to I/O state
1011 = Compare mode: Special Event Trigger (ECCPx resets Timer, sets CCPxIF bit starts A/D conversion if A/D
module is enabled)
(1)
CCP4/CCP5 only:
11xx =PWM mode
ECCP1/ECCP2/ECCP3
only:
1100 = PWM mode: PxA, PxC active-high; PxB, PxD active-high
1101 = PWM mode: PxA, PxC active-high; PxB, PxD active-low
1110 = PWM mode: PxA, PxC active-low; PxB, PxD active-high
1111 = PWM mode: PxA, PxC active-low; PxB, PxD active-low
Note 1: These bits are not implemented on CCP4 and CCP5.