r5f21346mnfp Renesas Electronics Corporation., r5f21346mnfp Datasheet - Page 635

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r5f21346mnfp

Manufacturer Part Number
r5f21346mnfp
Description
Single-chip Mcus Incorporates The R8c Cpu Core
Manufacturer
Renesas Electronics Corporation.
Datasheet

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Part Number:
r5f21346mnfp#V0
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R8C/34M Group
R01UH0131EJ0100 Rev.1.00
Jun 21, 2011
29. D/A Converter
The D/A converters are 8-bit R-2R type units. There are two independent D/A converters.
29.1
Figure 29.1
Table 29.1
D/A conversion method
Resolution
Analog output pins
D/A conversion is performed by writing a value to the DAi register (i = 0 or 1). To output the conversion result, set
the DAiE bit in the DACON register to 1 (output enabled). Before using D/A conversion, set the corresponding bits
PD0_6 and PD0_7 in the PD0 register to 0 (input mode) and the PU01 bit in the PUR0 register to 0 (not pulled up).
The output analog voltage (V) is determined by the setting value n (n: decimal) of the DAi register.
Table 29.1 lists the D/A Converter Specifications. Figure 29.1 shows the D/A Converter Block Diagram and Figure
29.2 shows the D/A Converter Equivalent Circuit.
Overview
D/A Converter Specifications
D/A Converter Block Diagram
V = Vref × n/ 256 (n = 0 to 255)
Item
R-2R resistor ladder
R-2R resistor ladder
DA0 register
DA1 register
Vref: Reference voltage
R-2R method
8 bits
2 (DA0 and DA1)
DA0E bit
DA1E bit
Performance
0
1
0
1
DA0
DA1
29. D/A Converter
Page 603 of 740

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