18F8680 datasheet(180/496 Pages) MICROCHIP

180 / 496 page

PIC18F6585/8585/6680/8680

DS30491C-page 178

 2004 Microchip Technology Inc.

TABLE 16-2:

EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 40 MHz

FIGURE 16-2:

SIMPLIFIED BLOCK DIAGRAM OF THE ENHANCED PWM MODULE

FIGURE 16-3:

PWM OUTPUT RELATIONSHIPS (ACTIVE-HIGH STATE)

PWM Frequency

2.44 kHz

9.77 kHz

39.06 kHz

156.25 kHz

312.50 kHz

416.67 kHz

Timer Prescaler (1, 4, 16)

41111

PR2 Value

FFh

3Fh

1Fh

17h

Maximum Resolution (bits)

6.58

CCPR1L

CCPR1H (Slave)

Comparator

TMR2

Comparator

PR2

(Note 1)

Duty Cycle Registers

CCP1CON<5:4>

Clear Timer,

set CCP1 pin and

latch D.C.

Note

The 8-bit timer TMR2 register is concatenated with the 2-bit internal Q clock or 2 bits of the prescaler to create the 10-bit time base.

Alternate setting controlled by the ECCPMX bit (PIC18F8X8X devices only).

TRISC<2>

RC2/CCP1/P1A

TRISE<6>

RE6/AD14/P1B or RH7(2)

TRISE<5>

TRISG<4>

RG4/P1D

Output

Controller

P1M1<1:0>

CCP1M<3:0>

CCP1DEL

CCP1/P1A

P1B

P1C

P1D

RE5/AD13/P1C or RH6(2)

Period

SIGNAL

PR2 + 1

CCP1CON

<7:6>

P1A Modulated

P1B Modulated

P1A Active

P1B Inactive

P1C Inactive

P1D Modulated

P1A Inactive

P1B Modulated

P1C Active

P1D Inactive

Duty

Cycle

(Single Output)

(Half-Bridge)

(Full-Bridge,

Forward)

(Full-Bridge,

Reverse)

Delay(1)

Note 1:

Dead-band delay is programmed using the ECCP1DEL register (Section 16.2.6 “Programmable Dead-Band Delay”).

18F8680 Datasheet(PDF) 180 Page - Microchip Technology

18F8680 Datasheet(HTML) 180 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL