UPD784218 Datasheet, PDF (38/92 Pages) NEC – 16-/8-BIT SINGLE-CHIP MICROCONTROLLERS

µPD784218, 784218Y
8.6 D/A Converter
A D/A converter converts an input digital signal into an analog voltage. This microcontroller is provided with a
voltage output type D/A converter with a resolution of 8 bits and two channels.
The conversion method is of R-2R resistor ladder type.
D/A conversion is started by setting DACE0 of D/A converter mode register 0 (DAM0) and DACE1 of D/A converter
mode register 1 (DAM1).
The D/A converter operates in the following two modes:
• Normal mode
The converter outputs an analog voltage immediately after it has completed D/A conversion.
• Real-time output mode
The converter outputs an analog voltage in synchronization with an output trigger after it has completed D/A
conversion.
Figure 8-8. D/A Converter Block Diagram
AVREF1
DACS0
8
2R
R
2R
ANO0
Selector
R
2R
2R
DACS1
8
2R
R
2R
ANO1
AVSS
Selector
R
2R
2R
38
Data Sheet U12304EJ2V0DS00