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| PIC18F4550-IP Datasheet, PDF (157/438 Pages) Microchip Technology – 28/40/44-Pin, High-Performance, Enhanced Flash, USB Microcontrollers with nanoWatt Technology | |||
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PIC18F2455/2550/4455/4550
FIGURE 16-2:
PWM OUTPUT RELATIONSHIPS (ACTIVE-HIGH STATE)
CCP1CON
<7:6>
SIGNAL
0
Duty
Cycle
Period
00 (Single Output)
10 (Half-Bridge)
(Full-Bridge,
01 Forward)
(Full-Bridge,
11
Reverse)
P1A Modulated
P1A Modulated
P1B Modulated
P1A Active
P1B Inactive
P1C Inactive
P1D Modulated
P1A Inactive
P1B Modulated
P1C Active
P1D Inactive
Delay(1)
Delay(1)
PR2 + 1
FIGURE 16-3:
PWM OUTPUT RELATIONSHIPS (ACTIVE-LOW STATE)
CCP1CON
<7:6>
SIGNAL
0
Duty
Cycle
Period
PR2 + 1
00 (Single Output)
10 (Half-Bridge)
P1A Modulated
P1A Modulated
P1B Modulated
P1A Active
Delay(1)
Delay(1)
(Full-Bridge,
01 Forward)
P1B Inactive
P1C Inactive
(Full-Bridge,
11
Reverse)
P1D Modulated
P1A Inactive
P1B Modulated
P1C Active
P1D Inactive
Relationships:
⢠Period = 4 * TOSC * (PR2 + 1) * (TMR2 Prescale Value)
⢠Duty Cycle = TOSC * (CCPR1L<7:0>:CCP1CON<5:4>) * (TMR2 Prescale Value)
⢠Delay = 4 * TOSC * (ECCP1DEL<6:0>)
Note 1: Dead-band delay is programmed using the ECCP1DEL register (Section 16.4.6 âProgrammable Dead-Band Delayâ).
© 2009 Microchip Technology Inc.
DS39632E-page 155
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