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HT98R068-1 Arkusz danych(PDF) 63 Page - Holtek Semiconductor Inc

Numer części HT98R068-1
Szczegółowy opis  Two Way Radio 8-Bit MCU
Download  116 Pages
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Producent  HOLTEK [Holtek Semiconductor Inc]
Strona internetowa  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT98R068-1 Arkusz danych(HTML) 63 Page - Holtek Semiconductor Inc

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HT98R068-1
Two Way Radio 8-Bit MCU
HT98R068-1
Two Way Radio 8-Bit MCU
jmp
polling_EOC
;continue polling
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
:
jmp
start_conversion ;start next A/D conversion
Note: To power off ADC module, it is necessary to set ADONB as “1”.
Example: using the interrupt method to detect the end of conversion
clr
EADI
;disable ADC interrupt
mov
a,00000001B
mov
ACSR,a
;select fSYS/8 as A/D clock and ADONB=0
mov
a,0Fh
;setup ANCSR to configure pins AN0~AN3
mov
ANCSR0,a
mov
a, 00h
mov
ANCSR1,a
;
mov
a,00000000B
;
mov
ADCR, a
;select AN0 to be connected to the A/D
;converter
:
Start_conversion:
clr
START
set
START
;reset A/D
clr
START
;start A/D
clr
ADF
;clear ADC interrupt request flag
set
EADI
;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: To power off ADC module, it is necessary to set ADONB as “1”.


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