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Not really, your questions are too vague.
1) What ADC? How many bits and at what speed does it operate?
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-->Highspeed AD/DA Card made by terasic for HSMC: 14-bit resolution and data rate up to 65 MSPS.
http://www.terasic.com.tw/cgi-bin/page/archive.pl?language=english&categoryno=73&no=278&partno=1 and I want to use it as Analog to digital converter.
Although there are data pin configuration given in its user manual I am not sure about control pins how to map.
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2) Which version of USB - 1.0 (12Mbps), 2.0 (480Mbps), or 3.0 (5Gbps)?
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-->In the user manual of DE2-115, it is given that: USB rev. 2.0 data transfer at full speed(12 Mbps) and low speed(1.5 Mbps).
and I want to operate it at full speed(12 mbps)
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3) Do you have a specific board in mind? Since you mention HSMC, its likely you already have a board.
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-->The board I already have is DE2-115 (Cyclone IVE).
http://www.terasic.com.tw/cgi-bin/page/archive.pl?language=english&categoryno=139&no=502 --- Quote Start ---
Provide this information and you'll get more help.
Cheers,
Dave
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-->Thanks for your response and further infos are available above :)