HT66F019 datasheet(111/175 Pages) HOLTEK

111 / 175 page

Rev. 1.00

110

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Rev. 1.00

111

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HT66F019

A/D Flash MCU with EEPROM

HT66F019

A/D Flash MCU with EEPROM

Example: using the interrupt method to detect the end of conversion

clr ADE

; disable ADC interrupt

mov a,03H

mov SADC1,a ;selectfSYS/8asA/Dclock

set ADCEN

mov a,0Fh ;setupACERLtoconfigurepinsAN0~AN3

mov ACERL,a

mov a,20h

mov SADC0,a ;enableandconnectAN0channeltoA/Dconverter

Start_conversion:

clr START ;highpulseonSTARTbittoinitiateconversion

set START ;resetA/D

clr START ;startA/D

clr ADF;clearADCinterruptrequestflag

set ADE

; 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,SADOL ;readlowbyteconversionresultvalue

mov SADOL_buffer,a ;saveresulttouserdefinedregister

mov a,SADOH ;readhighbyteconversionresultvalue

mov SADOH_buffer,a ;saveresulttouserdefinedregister

EXIT_INT_ISR:

mov a,status_stack

mov STATUS,a ;restoreSTATUSfromuserdefinedmemory

mov a,acc_stack;restoreACCfromuserdefinedmemory

reti

HT66F019 Datasheet(PDF) 111 Page - Holtek Semiconductor Inc

HT66F019 Datasheet(HTML) 111 Page - Holtek Semiconductor Inc

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