Contec DAI12-4FITGY, Руководство пользователя, Страница: 25 / 65

Using the I/O Address Map
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DAI12-4(FIT)GY
Overview of the D/A Conversion Function
The analog output function produces specified 12-bit digital data from a specified
channel as corresponding voltage or current analog output.
By setting a specific analog output mode, you can specify the method by which the
analog output is to be produced.
Two analog output modes are supported:
- Transparent output mode
- Synchronous output mode
The transparent output mode updates the analog output from a specified channel
immediately after output data is set.
The synchronous output mode pre-sets output data to the channels on which analog
output is to be updated, and simultaneously updates analog output from multiple
channel when the synchronous output command is issued.
The following chart illustrates the basic conversion process.
Figure 4.6. Figure 4.7.
Transparent Output Mode Synchronous Output Mode
Transparent
Initialize
Set
output range
DSB?
Set channel
Set data
EOC?
Final channel?
End
No
No
No
Yes
Yes
Yes
Transparent
Initialize
Set
output range
DSB?
Set channel
Set data
EOC?
End
No
No
Yes
Yes