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M38K09RFS Datasheet(PDF) 203 Page - Renesas Technology Corp

Part # M38K09RFS
Description  RENESAS 8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
PDF  328 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

M38K09RFS Datasheet(HTML) 203 Page - Renesas Technology Corp

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2.7 A/D converter
Rev.2.00
Oct 05, 2006
page 74 of 111
38K0 Group
REJ09B0337-0200
APPLICATION
2.7.3 A/D converter application examples
(1)
Conversion of analog input voltage
Outline : The analog input voltage input from a sensor is converted to digital values.
Figure 2.7.7 shows a connection diagram, and Figure 2.7.8 shows the related registers setting.
Fig. 2.7.7 Connection diagram
Specifications : •The analog input voltage input from a sensor is converted to digital values.
•P10/DQ0/AN0 pin is used as an analog input pin.
Fig. 2.7.8 Related registers setting
P10/DQ0/AN0
38K0 Group
Sensor
AD control register (address 3616)
ADCON
0
Analog input pin : P10/DQ0/AN0 selected
A/D conversion start
0
0
b0
b7
AD conversion register 2 (address 3816)
AD2
AD1
b0
b7
b0
b7
(Read-only)
AD conversion register 1 (address 3716)
(Read-only)
A result of A/D conversion is stored (Note).
Note: After bit 3 of ADCON is set to “1”, read out that contents.
When reading 10-bit data, read address 003816 before address 003716;
when reading 8-bit data, read address 003716 only.
When reading 10-bit data, bits 2 to 6 of address 003816 are “0”.
0
0



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