mb90f377pff-g Fujitsu Microelectronics, Inc., mb90f377pff-g Datasheet - Page 81

• Manufacturer Part Number: mb90f377pff-g
• Description: 16-bit Proprietary Microcontroller
• Manufacturer: Fujitsu Microelectronics, Inc.

15. D/A converter
Value written to DA07 to DA00 and DA17 to DA10
The D/A (Digital to Analog) converter is used to generate an analog output from an 8-bit digital input. By setting
the enable bit in the D/A control register (DACR) to 1, it will enable the corresponding D/A output channel. Hence,
setting this bit to 0 will disable that channel.
If D/A output is disabled, the analog switch inserted to the output of each D/A converter channel in series is
turned off. In the D/A converter, the bit is cleared to 0 and the direct-current path is shut off. The above is also
true in the stop mode.
The output voltage of the D/A converter ranges from 0 V to 255/256 x AV
The D/A converter output does not have the internal buffer amplifier. The analog switch (
to the output in series. To apply load to the output externally, estimate a sufficient stabilization time.
Table below lists the theoretical values of output voltage of the D/A converter.
FD
FE
FF
00
01
02
:
H
H
H
H
H
H
Theoretical value of output voltage
MB90370/375 Series
0/256
253/256
254/256
255/256
CC
1/256
2/256
.
AV
:
CC
AV
AV
AV
AV
AV
(
CC
CC
CC
CC
CC
0 V)
100
is inserted
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