HT45F75 datasheet(111/190 Pages) HOLTEK

111 / 190 page

Rev. 1.10

110

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Rev. 1.10

111

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HT45F75

Body Fat Scale Flash MCU

HT45F75

Body Fat Scale Flash MCU

A/D Programming Example

Example: Using an EOC polling method to detect the end of conversion

#include ht45f75.inc

data .section 'data'

adc_result_data_l db?

adc_result_data_m db?

adc_result_data_h db?

code .section ‘code’

start:

clr ADE

; disable ADC interrupt

mova,0C3H;PowercontrolforPGA,ADC

movPWRC,a;PWRC=11000011,LDOenable,VCMenable,

;LDOBypassdisable,LDOoutputvoltage:3.3V

mov a, 000H

movPGAC0,a;PGAgain=1,ADCgain=1,VREFgain=1

mov a, 080H

movPGAC1,a;VCM=1.25V,INIS,DCSET2~0indefaultvalue

setVRBUFP;enablebufferforVREF+

setVRBUFN;enablebufferforVREF-

setVREFS ;forusingexternalreference

clrADOR2 ;for10Hzoutputdatarate,ADOR[2:0]=001,FLMS[2:0]=000

clrADOR1

setADOR0

clrFLMS2

clrFLMS1

clrFLMS0

clrADOFF ;ADCexitpowerdownmode.

setADRST ;ADCinresetmode

clrADRST ;ADCinconversion(continuesmode)

clrEOC;Clear“EOC”flag

loop:

snzEOC;Polling“EOC”flag

jmploop ;Waitforreaddata

clradc_result_data_h

clradc_result_data_m

clr adc_result_data_l

mova,ADRL

movadc_result_data_l,a;GetLowbyteADCvalue

mova,ADRM

movadc_result_data_m,a;GetMiddlebyteADCvalue

mova,ADRH

movadc_result_data_h,a;GetHighbyteADCvalue

get_adc_value_ok:

clrEOC ;Clearingreadflag

jmp loop

; for next data read

end

HT45F75 데이터시트(PDF) 111 Page - Holtek Semiconductor Inc

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