PIC18F2220 Datasheet, PDF (148/388 Pages) Microchip Technology – 28/40/44-Pin High-Performance, Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

PIC18F2220/2320/4220/4320
16.4.3 FULL-BRIDGE MODE
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, pin RC2/CCP1/P1A is continuously
active and pin RD7/PSP7/P1D is modulated. In the
Reverse mode, RD6/PSP6/P1C pin is continuously
active and RD5/PSP5/P1B pin is modulated. These are
illustrated in Figure 16-6.
P1A, P1B, P1C and P1D outputs are multiplexed with
the PORTC<2> and PORTD<5:7> data latches. The
TRISC<2> and TRISD<5:7> bits must be cleared to
make the P1A, P1B, P1C and P1D pins output.
FIGURE 16-6:
FULL-BRIDGE PWM OUTPUT
FORWARD MODE
P1A⁽²⁾
Period
Duty Cycle
P1B⁽²⁾
P1C⁽²⁾
P1D⁽²⁾
(1)
(1)
REVERSE MODE
P1A⁽²⁾
Duty Cycle
Period
P1B⁽²⁾
P1C⁽²⁾
P1D⁽²⁾
(1)
(1)
Note 1: At this time, the TMR2 register is equal to the PR2 register.
Note 2: Output signal is shown as active-high.
DS39599C-page 146
 2003 Microchip Technology Inc.