HT45F65 datasheet(148/231 Pages) HOLTEK

148 / 231 page

Rev. 1.60

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Rev. 1.60

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HT45F65/HT45F66/HT45F67

Glucose Meter 8-Bit Flash MCU

Example: 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

clr ADOFF

mov a, 00H

; setup ADCR0 register to configure Port as A/D inputs

mov ADCR0, a

; and select AN0 to be connected to the A/D

Start_conversion:

clr START

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_:

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_ISR:

mov a, status_stack

mov STATUS, a

; restore STATUS from user defined memory

mov a, acc_stack

; restore ACC from user defined memory

clr ADF

; clear ADC interrupt flag

reti

Note:TopowerofftheADC,itisnecessarytosetADOFFas"1".

HT45F65 Datasheet(PDF) 148 Page - Holtek Semiconductor Inc

HT45F65 Datasheet(HTML) 148 Page - Holtek Semiconductor Inc

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