PIC16F1933-ESLASHP datasheet(186/418 Pages) MICROCHIP

186 / 418 page

PIC16F193X/LF193X

DS41364A-page 184

Preliminary

19.1

Capture/Compare/PWM

The 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 19-1 shows the timer resources required by the

CCP module.

TABLE 19-1:

REQUIRED TIMER

RESOURCES

CCP Mode

Timer Resource

Capture

Timer1

Compare

Timer1

PWM

Timer2 or 4 or 6

CCPXCON: CCPX CONTROL REGISTER

R/W-00

R/W-0/0

PxM1(1)

PxM0(1)

DCxB1

DCxB0

CCPxM3

CCPxM2

CCPxM1

CCPxM0

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)

If CCPxM<3:2> = 00, 01, 10:

PxA assigned as Capture/Compare input; PxB, PxC, PxD assigned as port pins

If CCPxM<3:2> = 11:

Single output; PxA modulated; PxB, PxC, PxD assigned as port pins

Full-Bridge output forward; P1D modulated; P1A active; P1B, P1C inactive

Half-Bridge output; P1A, P1B modulated with dead-band control; P1C, P1D assigned as port pins

Full-Bridge output reverse; P1B modulated; P1C active; P1A, P1D 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

= Capture mode

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: trigger special event (ECCPx resets TMR1 or TMR3, sets CCPxIF bit, ECCP2

trigger also starts A/D conversion if A/D module is enabled)(1)

CCP<5:4> only:

11xx

=PWM mode

ECCP<3:1> 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

These bits are not implemented on CCP<5:4>.

PIC16F1933-E/P Datasheet(PDF) 186 Page - Microchip Technology

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