PIC16F631/677/685/687/689/690
11.4.2
FULL-BRIDGE MODE
In Full-Bridge mode, all four pins are used as outputs.
An example of Full-Bridge application is shown in
Figure 11-10.
In the Forward mode, pin CCP1/P1A is driven to its active
state, pin P1D is modulated, while P1B and P1C will be
driven to their inactive state as shown in Figure 11-11.
In the Reverse mode, P1C is driven to its active state,
pin P1B is modulated, while P1A and P1D will be driven
to their inactive state as shown Figure 11-11.
P1A, P1B, P1C and P1D outputs are multiplexed with
the PORT data latches. The associated TRIS bits must
be cleared to configure the P1A, P1B, P1C and P1D
pins as outputs.
FIGURE 11-10:
EXAMPLE OF FULL-BRIDGE APPLICATION
V+
QC
QA
FET
Driver
FET
Driver
P1A
P1B
Load
FET
Driver
FET
Driver
P1C
P1D
QD
QB
V-
© 2007 Microchip Technology Inc.
DS41262D-page 137
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