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HT45R4U датащи(PDF) 56 Page - Holtek Semiconductor Inc |
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HT45R4U датащи(HTML) 56 Page - Holtek Semiconductor Inc |
56 / 105 page Rev. 1.10 �6 �a��� 1�� �01� Rev. 1.10 �7 �a��� 1�� �01� HT45R4U TinyPowerTM A/D Type e-Banking ASSP OTP MCU with LCD A/D Programming Example ThefollowingtwoprogrammingexamplesillustratehowtosetupandimplementanA/D conversion.Inthefirstexample,themethodofpollingtheEOCBbitintheADCRregisterisusedto detectwhentheconversioncycleiscomplete,whereasinthesecondexample,theA/Dinterruptis usedtodeterminewhentheconversioniscomplete. Example: using an EOCB polling method to detect the end of conversion clr ADE ; disable ADC interrupt mov a,03H mov ADCR1,a ; select fSYS/8 as A/D clock and switch off 1.25V clr ADOFF mov a,0Fh ; setup ACER to configure analog pins AN0~AN3 mov ACER,a mov a,00h mov ADCR0,a ; enable and connect AN0 channel to A/D converter : start_conversion: clr START ; high pulse on start bit to initiate conversion set START ; reset A/D clr START ; start A/D polling_EOC: sz EOCB ; poll the ADCR0 register EOCB bit to detect end ; of A/D conversion jmp polling_EOC ; continue polling mov a,ADRL ; read low byte conversion result value mov ADRL_buffer,a ; save result to user defined register mov a,ADRH ; read high byte conversion result value mov ADRH_buffer,a ; save result to user defined register : : jmp start_conversion ; start next a/d conversion |
Аналогичный номер детали - HT45R4U |
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Аналогичное описание - HT45R4U |
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