HT67F5652 datasheet(133/224 Pages) HOLTEK

133 / 224 page

Rev. 1.00

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Rev. 1.00

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HT67F5652

24-Bit Delta Sigma A/D + LCD Flash MCU

HT67F5652

24-Bit Delta Sigma A/D + LCD Flash MCU

OPP[1:0]

OPN[1:0]

AN0

AN2

AN4

AN6

OPO

AN3

AN5

AN7

OPAMP

OPI+

OPI-

DSOPEN

OPO

Operational Amplifier Structure

A/D Programming Example

Example:UsinganEOCpollingmethodtodetecttheendofconversion

#include ht67f5652.inc

data .section ‘data’

adc_result_data_l db ?

adc_result_data_m db ?

adc_result_data_h db ?

code .section ‘code’

start:

clr

ADE

; disable ADC interrupt

mov

a, 083H

; Power control for PGA, ADC

mov PWRC, a

; PWRC=10000011, LDO enable, VCM enable, LDO Bypass disable,

; LDO output voltage: 3.3V

mov

a, 000H

mov

PGAC0, a

; PGA gain=1, ADC gain=1, VREF gain=1

mov

a, 000H

mov

PGAC1, a

; INIS, INX, DCSET in default value

clr

VRBUFP

; disable buffer for VREF+

clr

VRBUFN

; disable buffer for VREF-

set

VREFS

; for using external reference

clr

ADOR2

; for 10Hz output data rate, ADOR[2:0]=001, FLMS[2:0]=000

clr ADOR1

set ADOR0

clr FLMS2

clr FLMS1

clr FLMS0

clr

ADOFF

; ADC exit power down mode.

set

ADRST

; ADC in reset mode

clr

ADRST

; ADC in convertsion (continuous mode)

clr

EOC

; Clear "EOC" flag

loop:

snz

EOC

; Polling "EOC" flag

jmp

loop

; Wait for read data

clr

adc_result_data_h

clr

adc_result_data_m

clr

adc_result_data_l

set

ADCDL

; enable data latch

mov

a, ADRL

mov

adc_result_data_l, a ; Get Low byte ADC value

mov

a, ADRM

mov

adc_result_data_m, a ; Get Middle byte ADC value

mov

a, ADRH

mov

adc_result_data_h, a ; Get High byte ADC value

get_adc_value_ok:

clr

ADCDL

; disable data latch

clr

EOC

; Clearing read flag

jmp

loop

; for next data read

end

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