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Altera_Forum's avatar
Altera_Forum
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16 years ago

EP2C8 start-up problem

Hello I have a board with an EP2C8 that displays a strange problem when loaded with a certain application. When I apply power to the device, nothing happens - but the minute I connect my...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

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sensei,

This sounds like some sort of control signal polarity or a power rail problem. Connecting the ByteBlaster will should put a definite value on the nCS, nCE, and nCONFIG signals that might be fixing a polarity problem. Compare you circuitry against the circuit diagram in the Device Handbook.

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I read on another post titled "Stratix II Configuration Problem" in this forum with a similar problem. The author found that disabling compressed bitstreams worked to resolve his/her issue.

I tried this on my board and now it starts up without any problems.

Problem is that I can just barely fit my design now, and I want to expand on it in the future. Does anyone have any idea WHY this would work? Seems odd to me, I mean compressed bitstreams should not affect how the programming pins are handled should it?

//TG