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Giải thích chi tiết về linh kiện  Enhanced 8051 Microcontroller with 20bit Σ-ΔADC and LCD Driver
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SH79F6489P/080PR bảng dữ liệu(HTML) 108 Page - SINOWEALTH Electronic Ltd

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Table 8.30 ADC data output mode register
92H
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
ADCDS
-
-
-
-
-
ADCRATE
VINOS
ADCDF
R/W
-
-
-
-
-
R/W
R/W
R/W
Reset Value
(POR/WDT/LVR/PIN)
-
-
-
-
-
0
1
0
Bit Number
Bit Mnemonic
Description
2
ADCRATE
ADC data output rate mode
0:normal mode
1:standby test mode, not recommended
1
VINOS
VIN Configuration bit
0: P1.7 and P2.0 as I/O
1: P1.7 and P2.0 as VIN
0
ADCDF
ADC output data Storage format
0: ADC output data is bipolar mode
1: ADC output data is unipolar mode
ADC Conversion Data Value refer to following:
ADCDF = 0, ADC output data is bipolar mode
ADC input
VREF
VREF/2
+1LSB
0
-1LSB
-VREF/2
-VREF
ADC Data
(hexadecimal)
7FFFFH
40000H
00001H
00000H
FFFFFH
C0000H
80000H
ADC Data
(Decimal )
524287
262144
1
0
-1
-262144
-524288
ADCDF = 1, ADC output data is unipolar mode
ADC input
VREF
VREF/2
+1LSB
0
-1LSB
-VREF/2
-VREF
ADC Data
(hexadecimal)
FFFFFH
C0000H
80001H
80000H
7FFFFH
40000H
0
ADC Data
(Decimal )
1048575
786432
524289
524288
524287
262144
0
Start ADC Conversion Step:
(1) Select ADC channel and reference voltage.
(2) Enable ADC function start ADC conversion.
(3) ADCIF will be set when ADC conversion is finished, If ADC interrupt is enabled, an interrupt will generate.
(4) Obtain ADC conversion data by ADDH/ADDM/ADDL.
(5) Repeat step (3)-(4) to Obtain next ADC conversion data.



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