8-Bit D/A Converter Operation - Fujitsu FR60 Hardware Manual

CHAPTER 13 8-BIT D/A CONVERTER
13.3

8-bit D/A Converter Operation

The 8-bit D/A converter outputs the D/A output value set in the D/A data register when 1
is set in the D/A control register.
If D/A output from an 8-bit D/A converter channel is disabled, that channel outputs 0.0 V.
Such an output also applies to the operation in stop mode.
In output-enabled status, the D/A converter output voltage ranges from 0 V to 255/256 ×
DAVC V. The range of output voltage can be changed by external adjustment of the
DAVC pin.
■ Logical Expressions for D/A Converter Output Voltage
Table 13.3-1 lists the logical expressions used to calculate the D/A converter output voltage.
Table 13.3-1 Logical Expressions for D/A Converter Output Voltage
Note: The D/A converter output contains no buffer amplifier.
384
Values specified in
DADR0
DADR1
DADR2
00
H
01
H
02
H
to
FD
H
FE
H
FF
H
D/A converter output
0/256 × DAVC (=0V)
1/256 x DAVC
2/256 x DAVC
to
253/256 x DAVC
254/256 x DAVC
255/256 x DAVC