PIC18F87K22 Datasheet, PDF (264/548 Pages) Microchip Technology – 64/80-Pin, High-Performance, 1-Mbit Enhanced Flash Microcontrollers with 12-Bit A/D and nanoWatt XLP Technology

PIC18F87K22 FAMILY
TABLE 20-3: EXAMPLE PIN ASSIGNMENTS FOR VARIOUS PWM ENHANCED MODES
ECCP Mode
PxM<1:0>
PxA
PxB
PxC
PxD
Single
00
Yes⁽¹⁾
Yes⁽¹⁾
Yes⁽¹⁾
Half-Bridge
10
Yes
Yes
No
Full-Bridge, Forward
01
Yes
Yes
Yes
Full-Bridge, Reverse
11
Yes
Yes
Yes
Note 1: Outputs are enabled by pulse steering in Single mode (see Register 20-5).
Yes⁽¹⁾
No
Yes
Yes
FIGURE 20-4:
PxM<1:0>
EXAMPLE PWM (ENHANCED MODE) OUTPUT RELATIONSHIPS
(ACTIVE-HIGH STATE)
Signal
0
Pulse Width
PR2 + 1
Period
00 (Single Output)
10 (Half-Bridge)
PxA Modulated
PxA Modulated
PxB Modulated
Delay⁽¹⁾
Delay⁽¹⁾
PxA Active
(Full-Bridge,
01
Forward)
PxB Inactive
PxC Inactive
PxD Modulated
PxA Inactive
(Full-Bridge,
11
Reverse)
PxB Modulated
PxC Active
PxD Inactive
Relationships:
• Period = 4 * TOSC * (PR2 + 1) * (TMR2 Prescale Value)
• Pulse Width = TOSC * (CCPRxL<7:0>:CCPxCON<5:4>) * (TMR2 Prescale Value)
• Delay = 4 * TOSC * (ECCPxDEL<6:0>)
Note 1: Dead-band delay is programmed using the ECCPxDEL register (Section 20.4.6 “Programmable Dead-Band
Delay Mode”).
DS39960B-page 264
Preliminary
 2010 Microchip Technology Inc.