Datasheet

PIC18F87J11 FAMILY
DS39778E-page 228  2007-2012 Microchip Technology Inc.
19.4.5 FULL-BRIDGE MODE
In Full-Bridge Output mode, four pins are used as
outputs; however, only two outputs are active at a time.
In the Forward mode, the P1A pin is continuously
active and the P1D pin is modulated. In the Reverse
mode, the P1C pin is continuously active and the P1B
pin is modulated. These are illustrated in Figure 19-6.
P1A, P1B, P1C and P1D outputs are multiplexed with
the port pins, as described in Table 19-1, Table 19-2
and Table 19-3. The corresponding TRIS bits must be
cleared to make the P1A, P1B, P1C and P1D pins
outputs.
FIGURE 19-6: FULL-BRIDGE PWM OUTPUT
Period
Duty Cycle
P1A
(2)
P1B
(2)
P1C
(2)
P1D
(2)
Forward Mode
(1)
Period
Duty Cycle
P1A
(2)
P1C
(2)
P1D
(2)
P1B
(2)
Reverse Mode
(1)
(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.