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Altera_Forum
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8 years ago

Buffer chain output from DLL in ALTDLL

Hi, I require clocks with different phase shifts. Theoretically, the outputs at each stage of the buffers in the buffer chain of DLL in ALTDLL megafunction should do it. However, ALTDLL outputs only ...
Altera_Forum's avatar
Altera_Forum
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8 years ago

There are many things here that I don't understand.

Yes, the I/O standard is LVDS. The function I'm trying to implement is for sampling. For sampling, I am using the Terasic data conversion board, which gets sampling clock from the DE4 board using LVDS clock pins from HSMC-A connector. At each microsecond, I have to use one out of eight phase-delayed clocks (which are selected using a MUX) for sampling. That's why eight phase-delayed clocks need to be synchronized. Can you please suggest any method to implement this scheme.

I am not sure if the altlvds megafunction will work, as it serializes the data and sends at very high frequency while I need to select a phase-delayed 500MHz clock at each microsecond.