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HT67F60 Datasheet(PDF) 158 Page - Holtek Semiconductor Inc |
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HT67F60 Datasheet(HTML) 158 Page - Holtek Semiconductor Inc |
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158 / 242 page  Rev. 1.50 158 March 06 , 2012 Rev. 1.50 159 March 06 , 2012 HT67F30/HT67F40/HT67F50/HT67F60 TinyPowerTM A/D Flash Type 8-Bit MCU with LCD & EEPRO Example: using an EOCB polling method to detect the end of conversion clr EADI ; disable ADC interrupt mov a,03H mov ADCR1,a ;selectfSYS/8asA/Dclockandswitchoff1.25V clr ADOFF mov a,0Fh ;setupACERLandACERHtoconfigurepinsAN0~AN3 mov ACERL,a mov a,00h mov ACERH,00h ;ACERHisonlyforHT67F60 mov a,00h mov ADCR0,a ;enableandconnectAN0channeltoA/Dconverter : start_conversion: clr START ;highpulseonstartbittoinitiateconversion set START ;resetA/D clr START ;startA/D polling_EOC: sz EOCB ;polltheADCR0registerEOCBbittodetectend ;ofA/Dconversion jmppolling_EOC ;continuepolling mov a,ADRL ;readlowbyteconversionresultvalue mov ADRL_buffer,a;saveresulttouserdefinedregister mov a,ADRH ;readhighbyteconversionresultvalue mov ADRH_buffer,a;saveresulttouserdefinedregister : : jmp start_conversion ;startnexta/dconversion Example: using the interrupt method to detect the end of conversion clr EADI ; disable ADC interrupt mov a,03H mov ADCR1,a ;selectfSYS/8asA/Dclockandswitchoff1.25V Clr ADOFF mov a,0Fh ;setupACERLandACERHtoconfigurepinsAN0~AN3 mov ACERL,a mov a,00h mov ACERH,00h ;ACERHisonlyforHT67F60 mov a,00h mov ADCR0,a ;enableandconnectAN0channeltoA/Dconverter Start_conversion: clr START ;highpulseonSTARTbittoinitiateconversion set START ;resetA/D clr START ;startA/D clr ADF ;clearADCinterruptrequestflag set EADI ; enable ADC interrupt set EMI ;enableglobalinterrupt : : ; ADC interrupt service routine ADC_ISR: mov acc_stack,a ;saveACCtouserdefinedmemory mov a,STATUS mov status_stack,a;saveSTATUStouserdefinedmemory : : mov a,ADRL ;readlowbyteconversionresultvalue mov adrl_buffer,a;saveresulttouserdefinedregister mov a,ADRH ;readhighbyteconversionresultvalue mov adrh_buffer,a;saveresulttouserdefinedregister : : EXIT_INT_ISR: mov a,status_stack mov STATUS,a ;restoreSTATUSfromuserdefinedmemory mov a,acc_stack ;restoreACCfromuserdefinedmemory reti |
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