PIC18F25J50 MICROCHIP [Microchip Technology], PIC18F25J50 Datasheet - Page 266

• Manufacturer Part Number: PIC18F25J50
• Description: 28/44-Pin, Low-Power, High-Performance USB Microcontrollers with nanoWatt XLP Technology
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F46J50 FAMILY
FIGURE 18-18:
FIGURE 18-19:
FIGURE 18-20:
DS39931D-page 266
Note 1: Port outputs are configured as displayed
PORT Data
P1<D:A>
PORT Data
PORT Data
PORT Data
PxA Signal
P1<D:A>
STRn
2: Single PWM output requires setting at least
PWM
CCPxM1
CCPxM0
CCPxM1
CCPxM0
STRn
PWM
STRA
STRB
STRC
STRD
when
PxM<1:0> = 00 and CCPxM<3:2> = 11.
one of the STRx bits.
the
Port Data
SIMPLIFIED STEERING
BLOCK DIAGRAM
EXAMPLE OF STEERING EVENT AT END OF INSTRUCTION (STRSYNC = 0)
EXAMPLE OF STEERING EVENT AT BEGINNING OF INSTRUCTION (STRSYNC = 1)
CCPxCON
1
0
1
0
1
0
1
0
PWM Period
Port Data
TRIS
TRIS
TRIS
TRIS
register
RPn Pin
RPn Pin
RPn Pin
RPn Pin
bits,
P1n = PWM
18.5.7.1
The STRSYNC bit of the PSTRxCON register gives the
user two selections of when the steering event will
happen. When the STRSYNC bit is ‘0’, the steering
event will happen at the end of the instruction that
writes to the PSTRxCON register. In this case, the out-
put signal at the Px<D:A> pins may be an incomplete
PWM waveform. This operation is useful when the user
firmware needs to immediately remove a PWM signal
from the pin.
When the STRSYNC bit is ‘1’, the effective steering
update will happen at the beginning of the next PWM
period. In this case, steering on/off the PWM output will
always produce a complete PWM waveform.
Figures
of the PWM steering depending on the STRSYNC
setting.
P1n = PWM
18-19
Steering Synchronization
and
18-20
 2011 Microchip Technology Inc.
illustrate the timing diagrams
Port Data
Port Data