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Altera_Forum's avatar
Altera_Forum
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10 years ago

Problem with configure Stratix III with AS using EPCS128

Hi! I have a problem with configure my Stratix III EP3SL340H1152I3. I programming EPCS128 device through FPGA via JTAG normaly, with verification sucsessfuly. But after power off and power on a...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

It's sounding more and more like a signal integrity issue, although 1-2cm is nothing to worry about.

Your scope plot doesn't look particularly reassuring. However, with the probe in contact the device configures? Is that right? If so, then the actual signal quality is not that bad. Any chance you can connect to a more local ground connection? Ideally, a soldered ground connection near the probe point. That will improve the trace somewhat.

Is this board a one off? Do you have another to try?

How good do you're power rails look? Check them all but specifically, VCCPGM and VCCL. VCCBAT isn't floating, is it?

Cheers,

Alex