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HT45R4U датащи(PDF) 57 Page - Holtek Semiconductor Inc

номер детали HT45R4U
подробное описание детали  TinyPowerTM A/D Type e-Banking ASSP OTP MCU with LCD
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производитель  HOLTEK [Holtek Semiconductor Inc]
домашняя страница  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45R4U датащи(HTML) 57 Page - Holtek Semiconductor Inc

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HT45R4U
TinyPowerTM A/D Type
e-Banking ASSP OTP MCU with LCD
Example 2: using the interrupt 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
clr ADF
; clear ADC interrupt request flag
set ADE
; enable ADC interrupt
set EMI
; enable global interrupt
:
:
; ADC interrupt service routine
ADC_ISR:
mov acc_stack,a
; save ACC to user defined memory
mov a,STATUS
mov status_stack,a
; save STATUS to user defined memory
:
:
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
:
:
EXIT_INT_ISR:
mov a,status_stack
mov STATUS,a
; restore STATUS from user defined memory
mov a,acc_stack
; restore ACC from user defined memory
reti


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