Datasheet

Section 19 D/A Converter
R01UH0309EJ0500 Rev. 5.00 Page 1097 of 1408
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
19.2 Input/Output Pins
Table 19.1 shows the pin configuration of the D/A converter.
Table 19.1 Pin Configuration
Pin Name Symbol I/O Function
Analog power pin AVCC Input Analog power
Analog ground pin AVSS Input Analog ground
Reference voltage pin Vref Input Reference voltage of D/A converter
Analog output pin 2 DA2 Output Channel 2 analog output
Analog output pin 3 DA3 Output Channel 3 analog output
19.3 Register Descriptions
The D/A converter has the following registers.
• D/A data register 2 (DADR2)
• D/A data register 3 (DADR3)
• D/A control register 23 (DACR23)
19.3.1 D/A Data Registers 2 and 3 (DADR2 and DADR3)
DADR2 and DADR3 are 8-bit readable/writable registers that store data for conversion.
Whenever analog output is enabled, the values in DADR are converted and output to the analog
output pins.