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Altera_Forum's avatar
Altera_Forum
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13 years ago

Cyclone IV not stable on my PCBs, completely stumped

I've got an EP4CE10F17C8 based design that I've recently moved from an Issue 1 PCB to an Issue 2 PCB, and now it's not behaving properly. Even a very simple configuration containing just a modulo 10 ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Thanks Nial, it's looking like a clock problem. I tried putting the clock through a PLL and that seems to have fixed it. I'm still a bit mystified because the clock signal looks clean at the driver and only travels along about 30mm of track.