参数资料
型号: MB90522BPFV
元件分类: 微控制器/微处理器
英文描述: 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP120
封装: PLASTIC, QFP-120
文件页数: 60/99页
文件大小: 978K
代理商: MB90522BPFV
MB90520A/520B Series
63
14. 8-bit D/A Converter
The 8-bit D/A converter performs R-2R D/A conversion with 8-bit resolution.
Two D/A converter channels with independent analog outputs are provided.
D/A converter functions
D/A converter theoretical output voltage
Note : DVCC voltage : D/A converter reference voltage. This must not exceed VCC.
Also, always ensure that DVSS is equipotential to VSS.
Function
D/A conversion time
The settling time is 12.5 s. This is independent of the machine clock.
Conversion method
R-2R conversion
Resolution
8-bit
Analog output pins
Two output pins are provided. Both pins can be used simultaneously.
Interrupts
None
D/A conversion trigger
Set the digital value in the D/A data register (DADR) , then enable D/A output in the
D/A control register (DACR) to start analog output from the D/A output pin.
EI2OS support
Not supported by the extended intelligent I/O service (EI2OS) .
D/A Data Register Setting
Theoretical Output Voltage Value
00H
0
/ 256 × DVCC voltage ( = 0 V)
00H
1
/ 256 × DVCC voltage
FEH
254
/ 256 × DVCC voltage
FFH
255
/ 256 × DVCC voltage
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