参数资料
型号: MB90822PFV
厂商: FUJITSU LTD
元件分类: 微控制器/微处理器
英文描述: 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PQFP80
封装: 0.50 MM PITCH, PLASTIC, LQFP-80
文件页数: 69/100页
文件大小: 1414K
代理商: MB90822PFV
MB90820 Series
70
13. D/A Converter
The D/A 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
× AVCC. To change the output voltage range,
adjust the AVCC voltage externally.
The D/A converter output does not have the internal buffer amplifier. The analog switch (= 100
) is inserted 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.
Value written to DA07 to DA00
and DA17 to DA10
Theoretical value of output voltage
00H
0/256
× AVCC (= 0 V)
01H
1/256
× AVCC
02H
2/256
× AVCC
::
FDH
253/256
× AVCC
FEH
254/256
× AVCC
FFH
255/256
× AVCC
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