PIC16F1933-ESLASHP datasheet(197/418 Pages) MICROCHIP

197 / 418 page

Preliminary

DS41364A-page 195

PIC16F193X/LF193X

19.6

PWM (Enhanced Mode)

The Enhanced PWM mode can generate a PWM signal

on up to four different output pins with up to 10-bits of

resolution. It can do this through four different PWM

output modes:

• Single PWM

• Half-Bridge PWM

• Full-Bridge PWM, Forward mode

• Full-Bridge PWM, Reverse mode

To select an Enhanced PWM mode, the P1M bits of the

CCP1CON register must be set appropriately.

The PWM outputs are multiplexed with I/O pins and are

designated P1A, P1B, P1C and P1D. The polarity of the

PWM pins is configurable and is selected by setting the

CCP1M bits in the CCP1CON register appropriately.

Table 19-7 shows the pin assignments for each

Enhanced PWM mode.

Figure 19-5 shows an example of a simplified block

diagram of the Enhanced PWM module.

FIGURE 19-5:

EXAMPLE SIMPLIFIED BLOCK DIAGRAM OF THE ENHANCED PWM MODE

TABLE 19-7:

EXAMPLE PIN ASSIGNMENTS FOR VARIOUS PWM ENHANCED MODES

Note:

The PWM Enhanced mode is available on

the

Enhanced

Capture/Compare/PWM

module (CCP1) only.

Note:

prevent

the

generation

incomplete waveform when the PWM is

first enabled, the ECCP module waits until

the start of a new PWM period before

generating a PWM signal.

CCPRxL

CCPRxH (Slave)

Comparator

TMRx

Comparator

PRx

(1)

Duty Cycle Registers

DCxB<1:0>

Clear Timerx,

toggle PWM pin and

latch duty cycle

Note

The 8-bit timer TMRx register is concatenated with the 2-bit internal Q clock, or 2 bits of the prescaler to create the 10-bit

time base.

TRISx

CCPx/P1A

TRISx

P1B

TRISx

P1C

TRISx

P1D

Output

Controller

PxM<1:0>

CCPxM<3:0>

PWMxCON

CCPx/P1A

P1B

P1C

P1D

Note 1: The TRIS register value for each PWM output must be configured appropriately.

2: Clearing the CCPxCON register will relinquish ECCP control of all PWM output pins.

3: Any pin not used by an Enhanced PWM mode is available for alternate pin functions.

ECCP Mode

PxM<1:0>

CCPx/P1A

P1B

P1C

P1D

Single

Yes(1)

Half-Bridge

Yes

Full-Bridge, Forward

Yes

Full-Bridge, Reverse

Yes

Note 1:

Pulse Steering enables outputs in Single mode.

PIC16F1933-E/P Datasheet(PDF) 197 Page - Microchip Technology

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