Datasheet

Section 20 D/A Converter
Rev. 3.00 Mar 21, 2006 page 580 of 788
REJ09B0300-0300
20.2 Input/Output Pins
Table 20.1 summarizes the input/output pins used by the D/A converter.
Table 20.1 Pin Configuration
Pin Name Symbol I/O Function
Analog power supply pin AVCC Input Analog block power supply
Analog ground pin AVSS Input Analog block ground and reference voltage
Analog output pin 0 DA0 Output Channel 0 analog output
Analog output pin 1 DA1 Output Channel 1 analog output
Reference power supply pin AVref Input Analog block reference voltage
20.3 Register Descriptions
The D/A converter has the following registers.
• D/A data register 0 (DADR0)
• D/A data register 1 (DADR1)
• D/A control register (DACR)
20.3.1 D/A Data Registers 0 and 1 (DADR0, DADR1)
DADR0 and DADR1 are 8-bit readable/writable registers that store data for D/A conversion.
When analog output is permitted, D/A data register contents are converted and output to analog
output pins. DADR0 and DADR1 are initialized to H'00.