HT66F4530 datasheet(131/224 Pages) HOLTEK

131 / 224 page

Rev. 1.00

130

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Rev. 1.00

131

De�e��e� �1� �01�

HT66F4530/HT66F4540/HT66F4550

A/D Flash MCU with Dual Operational Amplifiers

HT66F4530/HT66F4540/HT66F4550

A/D Flash MCU with Dual Operational Amplifiers

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,10h;setupPAS1registertoconfigurepinAN0

mov PAS1,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

HT66F4530 Datasheet(PDF) 131 Page - Holtek Semiconductor Inc

HT66F4530 Datasheet(HTML) 131 Page - Holtek Semiconductor Inc

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