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Altera_Forum
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16 years ago

PLL Reconfiguration problem on Cyclone3

In our design I have to reconfigure a PLL when we change from SD to HD video mode and back. (27 and 74.25 MHz input, and different output clocks.) For some reason clock stopped working and the onl...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

I managed to get the design working on the Eval Board.

But it still hasn't worked with the actual hard. Afetr some chat with other Altera developper I heard that the problem might come from instable PLL Voltage. We are going to measure that.

Did anybody expirience PLL problem dur to bad voltage.