PIC16C770 Microchip Technology Inc., PIC16C770 Datasheet - Page 62

• Manufacturer Part Number: PIC16C770
• Description: 18/20-pin, 8-bit Cmos Microcontrollers With 10/12-bit A/d
• Manufacturer: Microchip Technology Inc.

PIC16C717/770/771
In Full-Bridge Output mode, four pins are used as out-
puts; however, only two outputs are active at a time. In
the Forward mode, RB3/CCP1/P1A pin is continuously
active, and RB7/T1OSI/P1D pin is modulated. In the
Reverse mode, RB6/T1OSO/T1CKI/P1C pin is contin-
uously active, and RB5/SDO/P1B pin is modulated.
FIGURE 8-8:
DS41120B-page 60
Note 1: At this time, the TMR2 register is equal to the PR2 register.
FORWARD MODE
REVERSE MODE
P1A
P1B
P1C
P1D
P1A
P1B
P1C
P1D
2: Output signal is shown as asserted high.
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
FULL-BRIDGE PWM OUTPUT
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
(1)
(1)
Duty Cycle
Duty Cycle
Period
Period
P1A, P1B, P1C and P1D outputs are multiplexed with
PORTB<3> and PORTB<5:7> data latches. TRISB<3>
and TRISB<5:7> bits must be cleared to make the P1A,
P1B, P1C, and P1D pins output.
(1)
(1)
2002 Microchip Technology Inc.