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M38041FFHKP датащи(PDF) 251 Page - Renesas Technology Corp

номер детали M38041FFHKP
подробное описание детали  8-BIT CISC SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
PDF  387 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

M38041FFHKP датащи(HTML) 251 Page - Renesas Technology Corp

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APPLICATION
2.7 A/D converter
Rev.1.00 Jan 14, 2005
REJ09B0212-0100Z
3804 Group (Spec.H)
2.7.3 A/D converter application examples
(1)
Conversion of analog input voltage 1
Outline : The analog input voltage input from a sensor is converted to digital values.
Figure 2.7.8 shows a connection diagram, and Figure 2.7.9 shows the relevant registers setting.
Fig. 2.7.8 Connection diagram
Specifications : •The analog input voltage input from a sensor is converted to digital values.
•P60/AN0 pin is used as an analog input pin.
•10-bit A/D mode
Fig. 2.7.9 Relevant registers setting
P60/AN0
3804 Group
(Spec. H)
Sensor
AD/DA control register (address 003416)
ADCON
0
Analog input pin : P60/AN0 selected
A/D conversion start
0
0
0
b0
b7
AD conversion register 2 (address 003816)
AD2
AD1
b0
b7
b0
b7
AD conversion register 1 (address 003516)
(Read-only)
A result of A/D conversion is stored (Note).
Note: After bit 3 of AD/DA control register (ADCON) is set to “1”, read out that contents.
When reading 10-bit data, read address 003816 before address 003516.
When reading 10-bit data, bits 2 to 6 of address 003816 become “0”.
0
Analog input pin : AN0–AN7 selected
0
A result of A/D conversion is stored (read-only) (Note).
10-bit A/D mode



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