PIC18F87K90 Datasheet, PDF (259/566 Pages) Microchip Technology – 64/80-Pin, High-Performance Microcontrollers with LCD Driver and nanoWatt XLP Technology

PIC18F87K90 FAMILY
19.4.2 FULL-BRIDGE MODE
In Full-Bridge mode, all four pins are used as outputs.
An example of a full-bridge application is provided in
Figure 19-8.
In the Forward mode, the PxA pin is driven to its active
state and the PxD pin is modulated, while the PxB and
PxC pins are driven to their inactive state, as provided in
Figure 19-9.
In the Reverse mode, the PxC pin is driven to its active
state and the PxB pin is modulated, while the PxA and
PxD pins are driven to their inactive state, as provided
Figure 19-9.
The PxA, PxB, PxC and PxD outputs are multiplexed
with the port data latches. The associated TRIS bits
must be cleared to configure the PxA, PxB, PxC and
PxD pins as outputs.
FIGURE 19-8:
EXAMPLE OF FULL-BRIDGE APPLICATION
V+
FET
QA
Driver
QC _FET
Driver
PxA
PxB
Load
FET
Driver
FET
Driver
PxC
QB
QD
V-
PxD
 2010 Microchip Technology Inc.
Preliminary
DS39957B-page 259