Microchip Technology DM164134 データシート
© 2006 Microchip Technology Inc.
DS41159E-page 137
PIC18FXX8
16.5.3
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 RD4/PSP4/ECCP1/P1A is con-
tinuously active and pin RD7/PSP7/P1D is modulated.
In the Reverse mode, RD6/PSP6/P1C pin is continu-
ously active and RD5/PSP5/P1B pin is modulated.
These are illustrated in Figure 16-5.
puts; however, only two outputs are active at a time. In
the Forward mode, pin RD4/PSP4/ECCP1/P1A is con-
tinuously active and pin RD7/PSP7/P1D is modulated.
In the Reverse mode, RD6/PSP6/P1C pin is continu-
ously active and RD5/PSP5/P1B pin is modulated.
These are illustrated in Figure 16-5.
P1A, P1B, P1C and P1D outputs are multiplexed with
the PORTD<4:7> data latches. The TRISD<4:7> bits
must be cleared to make the P1A, P1B, P1C and P1D
pins output.
the PORTD<4:7> data latches. The TRISD<4:7> bits
must be cleared to make the P1A, P1B, P1C and P1D
pins output.
FIGURE 16-5:
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 asserted high.