PIC12F752 datasheet(83/204 Pages) MICROCHIP

83 / 204 page

 2011 Microchip Technology Inc.

Preliminary

DS41576A-page 83

PIC12F752/HV752

11.0

COMPLEMENTARY OUTPUT

GENERATOR (COG) MODULE

The primary purpose of the Complementary Output

Generator (COG) is to convert a single output PWM sig-

nal into a two output complementary PWM signal. The

COG can also convert two separate input events into a

single or complementary PWM output.

The COG PWM frequency and duty cycle are deter-

mined by a rising event input and a falling event input.

The rising edge and falling edge may be the same

source, if desired. Sources may be synchronous or

asynchronous to the COG clock.

The rate at which the rising event occurs determines

the PWM frequency. The time from the rising event

input to the falling event input determines the duty

cycle.

A selectable clock input is used to generate the phase

delay, blanking and dead-band times.

A simplified block diagram of the COG is shown in

Figure 11-1.

The COG module has the following features:

• Selectable clock source

• Selectable rising event source

• Selectable falling event source

• Independent output enables

• Independent output polarity selection

•Phase delay

• Dead-band control with independent rising and

falling edge dead-band times

• Blanking control with independent rising and fall-

ing edge blanking times

• Auto-shutdown control with:

- Selectable shutdown sources

- Auto-restart enable

- Auto-shutdown pin override control

FIGURE 11-1:

SIMPLIFIED COG BLOCK DIAGRAM

COG Clock

GxCS<1:0>

C1OUT

C2OUT

CCP1

C1OUT

C2OUT

CCP1

GxRS0<3:0>

GxFS0<3:0>

GxASDL1

GxASDL0

COG1OUT0

COG1OUT1

Fosc

GxDBR<3:0>

GxDBF<3:0>

GxPOL0

GxPOL1

COG1FLT

GxASDSFLT

C1OUT

GxASDSC1

C2OUT

GxASDSC2

HLTimer1 output

GxASDSHLT

GxARSEN

Fosc/4

HFINTOSC

Phase

Cnt/R

Dead Band

Cnt/R

Dead Band

Cnt/R

Blanking

Cnt/R

Delay

GxOE0

GxOE1

GxBLKR<3:0>

GxPH<3:0>

000

001

010

001

010

Blanking

Cnt/R

GxBLKF<3:0>

Write GxASDE Low

GxASDE

Auto-shutdown source

Set Dominates

(1)

Note

Auto-restart is shown this way for simplicity. Event latch

is set on the same event that clears the shutdown.

Write GxASDE High

Rising edge source

Falling edge source

PIC12F752 датащи(PDF) 83 Page - Microchip Technology

PIC12F752 датащи(HTML) 83 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

датащи скачать

ссылки URL