PIC16F689T-I/SO データシートの表示（PDF） - Microchip Technology

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PIC16F689T-I/SO

20-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

Microchip Technology 

PIC16F631/677/685/687/689/690

FIGURE 11-5:

EXAMPLE SIMPLIFIED BLOCK DIAGRAM OF THE ENHANCED PWM MODE

Duty Cycle Registers

CCPR1L

DC1B<1:0>

CCPR1H (Slave)

Comparator

R

TMR2

(1)

S

Comparator

PR2

Clear Timer2,

toggle PWM pin and

latch duty cycle

P1M<1:0>

CCP1M<3:0>

2

4

CCP1/P1A

TRIS

P1B

Q

Output

Controller

TRIS

P1C

TRIS

P1D

PWM1CON

TRIS

CCP1/P1A

P1B

P1C

P1D

Note 1: The 8-bit timer TMR2 register is concatenated with the 2-bit internal Q clock, or 2 bits of the prescaler to create the 10-bit

time base.

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

2: Clearing the CCP1CON 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

TABLE 11-4: EXAMPLE PIN ASSIGNMENTS FOR VARIOUS PWM ENHANCED MODES

ECCP Mode

P1M<1:0>

CCP1/P1A

P1B

P1C

P1D

Single

00

Yes(1)

Half-Bridge

10

Yes

Full-Bridge, Forward

01

Yes

Full-Bridge, Reverse

11

Yes

Note 1: Pulse Steering enables outputs in Single mode.

Yes(1)

Yes

Yes

Yes

Yes(1)

No

Yes

Yes

Yes(1)

No

Yes

Yes

© 2008 Microchip Technology Inc.

DS41262E-page 133

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