Microchip Technology DM164134 数据表
© 2006 Microchip Technology Inc.
DS41159E-page 135
PIC18FXX8
FIGURE 16-2:
PWM OUTPUT RELATIONSHIPS
0
Period
00
10
01
11
Delay
Delay
SIGNAL
PR2 + 1
ECCP1CON
<7:6>
P1A Modulated, Active-High
P1A Modulated, Active-Low
P1A Modulated, Active-High
P1A Modulated, Active-Low
P1B Modulated, Active-High
P1B Modulated, Active-Low
P1A Active, Active-High
P1A Active, Active-Low
P1B Inactive, Active-High
P1B Inactive, Active-Low
P1C Inactive, Active-High
P1C Inactive, Active-Low
P1D Modulated, Active-High
P1D Modulated, Active-Low
P1A Inactive, Active-High
P1A Inactive, Active-Low
P1B Modulated, Active-High
P1B Modulated, Active-Low
P1C Active, Active-High
P1C Active, Active-Low
P1D Inactive, Active-High
P1D Inactive, Active-Low
Relationships:
• Period = 4 * T
OSC
* (PR2 + 1) * (TMR2 Prescale Value)
• Duty Cycle = T
OSC
* (CCPR1L<7:0>:CCP1CON<5:4>) * (TMR2 Prescale Value)
• Delay = 4 * T
OSC
* ECCP1DEL
Duty
Cycle