CDP68HC68W1 데이터 시트보기 (PDF) - Intersil

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CDP68HC68W1

CMOS Serial Digital Pulse Width Modulator

Intersil 

CDP68HC68W1

00054* [6] 0108

00055 [2] 010A

00056* [6] 010C

00057 [2] 010E

00058* [6] 0110

00059

00060

00061 [5] 0112

00062

00063

00064

00065

00066

00067

00068

00069

00070

00071 [5] 0114

00072* [6] 0116

00073

00074

00075 [2] 0118

00076* [6] 011A

00077 [2] 011C

00078* [6] 011E

00079

00080

00081 [5] 0120

00082

00083

00084

00085

00086

00087

00088

00089

00090 [5] 0122

00091* [6] 0124

00092

00093

00094 [2] 0126

00095* [6] 0128

00096

00097

00098 [5] 012A

00099

00100

00101 [3] 012C

00102

00103

00104

00105

00106

00107

012E

00108

00109

00110 [2] 012E

00111 [4] 0130

00112 [6] 0132

00113

00114 [4] 0133

00115

00116 [5] 0135

00117 [6] 0138

00118

00119

00120 [5] 0139

00121 [5] 013B

AD29

A663

AD25

A61D

AD21

1000

1100

AD16

A631

AD17

A609

AD13

1000

1100

AD08

A611

AD09

1000

20FE

A650

B70A

81

B70C

0F0BFD

81

1000

1004

jsr

SPI_xmit

lda

#99

jsr

SPI_xmit

lda

#29

jsr

SPI_xmit

;set frequency to divide by 2000

;set pulse width to 30% duty cycle

DeselectW1_1

bset

W1,PortA

;deselect the W1 which loads registers

; with values transmitted

;

; Here the CDP68HC05C8B would generally

; attend to other processing issues

;

******* Modify Frequency and Pulse Width

bclr

jsr

W1,PortA

Set_SPI_Mode

SendCommands2

lda

jsr

lda

jsr

#49

SPI_xmit

#9

SPI_xmit

;select W1 (CE is active low)

;Setup the CDP68HC05 SPI Control....

;to talk to the W1

;set frequency to divide by 100 (the

;divide by 2 is still in effect)

;set pulse width to 20% duty cycle

DeselectW1_2

bset

W1,PortA

;deselect the W1 which loads registers

;

; Here the CDP68HC05C8B would again

; attend to other processing issues

;

******* Modify Pulse Width

bclr

jsr

SendCommands3

lda

jsr

W1,PortA

Set_SPI_Mode

#17

SPI_xmit

;select W1 (CE is active low)

;Setup the 68HC05 SPI control...

;to talk to the W1

;set pulse width to 38% duty cycle

DeselectW1_3

bset

Finish

bra

W1,PortA

*

;deselect the W1 which loads registers

;with values transmitted

;loop forever

***********************************************************************

*

Common Subroutines

***********************************************************************

Section Subroutines, *

Set_SPI_Mode

lda

sta

rts

SPI_Xmit

sta

SPI_wait

brclr

rts

#(2!SPE+2!MSTR) ;Enable SPI as a Master with....

SPCR

;CPHA=CPOL=0,

SPDR

;send A to SPI device

SPIF,SPSR,SPI_wait ;wait until transmit complete

Init_W1

bset

bset

W1,PortA

W1,DDRA

;disable the W1 (CE is active low)

;by activating PA0 as a high

8

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