PIC18F25K80 MICROCHIP [Microchip Technology], PIC18F25K80 Datasheet - Page 290

• Manufacturer Part Number: PIC18F25K80
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F66K80 FAMILY
FIGURE 20-16:
FIGURE 20-17:
FIGURE 20-18:
DS39977C-page 290
Note 1: Port outputs are configured as displayed when
STR<D:A>
P1<D:A>
Port Data
P1A Signal
STR<D:A>
Port Data
Port Data
Port Data
P1<D:A>
CCP1M1
CCP1M0
CCP1M1
CCP1M0
2: Single PWM output requires setting at least
PWM
STRA
STRB
STRC
STRD
PWM
the CCP1CON register bits, P1M<1:0> = 00
and CCP1M<3:2> = 11.
one of the STR<D:A> bits.
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)
1
0
1
0
1
0
1
0
PWM Period
Port Data
TRIS
TRIS
TRIS
TRIS
Output Pin
Output Pin
Output Pin
Output Pin
(1,2)
Preliminary
P1n = PWM
20.4.7.1
The STRSYNC bit of the PSTR1CON register gives the
user two choices for 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 PSTR1CON register. In this case, the out-
put signal at the P1<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
20-17
Steering Synchronization
and
20-18
 2011 Microchip Technology Inc.
illustrate the timing diagrams
Port Data
Port Data