Техническая Спецификация для Microchip Technology ARD00385
2009-2011 Microchip Technology Inc.
DS39957D-page 259
PIC18F87K90 FAMILY
FIGURE 19-5:
EXAMPLE ENHANCED PWM OUTPUT RELATIONSHIPS (ACTIVE-LOW STATE)
0
Period
00
10
01
11
Signal
PR2 + 1
PxM<1:0>
PxA Modulated
PxA Modulated
PxB Modulated
PxA Active
PxB Inactive
PxC Inactive
PxD Modulated
PxA Inactive
PxB Modulated
PxC Active
PxD Inactive
Pulse
Width
Width
(Single Output)
(Half-Bridge)
(Full-Bridge,
Forward)
(Full-Bridge,
Reverse)
Delay
(1)
Relationships:
• Period = 4 * T
OSC
* (PR2 + 1) * (TMR2 Prescale Value)
• Pulse Width = T
OSC
* (CCPRxL<7:0>:CCPxCON<5:4>) * (TMR2 Prescale Value)
• Delay = 4 * T
OSC
* (ECCPxDEL<6:0>)
Note
1:
Dead-band delay is programmed using the ECCP1DEL register (see
Delay
(1)