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38K2 Datasheet(PDF) 225 Page - Renesas Technology Corp

Part # 38K2
Description  RENESAS 8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
PDF  358 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

38K2 Datasheet(HTML) 225 Page - Renesas Technology Corp

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2.8 A/D converter
Rev.2.00
Oct 15, 2006
page 76 of 112
38K2 Group
REJ09B0338-0200
APPLICATION
An analog input signal from a sensor is converted to the digital value according to the related
registers setting shown by Figure 2.8.8. Figure 2.8.9 shows the control procedure for 8-bit read, and
Figure 2.8.10 shows the control procedure for 10-bit read.
Fig. 2.8.9 Control procedure for 8-bit read
Fig. 2.8.10 Control procedure for 10-bit read
ADCON (address 3616)
← XXXX00002
Read out AD1 (address 3716)
ADCON (address 3616), bit3 ?
1
0
•P10/DQ0/AN0 pin selected as analog input pin
•A/D conversion start
•Judgment of A/D conversion completion
•Read out of conversion result
q X: This bit is not used here. Set it to “0” or “1” arbitrarily.
Read out AD2 (address 3816)
ADCON (address 3616), bit3 ?
1
0
•P10/DQ0/AN0 pin selected as analog input pin
•A/D conversion start
•Judgment of A/D conversion completion
•Read out of high-order digit (b9, b8) of conversion result
Read out AD1 (address 3716)
•Read out of low-order digit (b7 – b0) of conversion result
q X: This bit is not used here. Set it to “0” or “1” arbitrarily.
ADCON (address 3616)
← XXXX00002



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