Operations; Table 17.4A Theoretical Values Of D/A Converter Output Voltages - Fujitsu F2MC-16LX MB90580 Series Hardware Manual

17.4 Operations

D/A output is started by writing a desired D/A output value to the D/A data register (DADR) and setting '1'
to the enable bit for the corresponding D/A output channel in the D/A control register (DACR).
Disabling D/A output turns off the analog switch that is inserted serially into the output of each D/A con-
verter channel. In addition, the D/A converter is internally cleared to '0' and the path of the DC
is shut down. This also applies in stop mode.
Table 17.4a shows the theoretical values of D/A converter output voltages
The D/A converter output voltages are between 0 V and 255/256 V
changed by regulating the DVR voltage externally.
The D/A converter output does not have an internal buffer amplifier. Since an analog switch (=100 Ω) is
serially inserted into the output, allow sufficient settling time when applying an external output load.

Table 17.4a Theoretical values of D/A converter output voltages

Values written to
DA07 to DA00
and
DA17 to DA10
00
01
02
FD
FE
FF
MB90580 Series
H
H
H
H
H
H
Theoretical values of output voltages
0/256 × DVR (=0 V)
1/256 × DVR
2/256 × DVR
253/256 × DVR
254/256 × DVR
255/256 × DVR
17.4 Operations
×
DVR. The output voltage range is
Chapter 17: D/A Converter
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