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Altera_Forum
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15 years ago

EP3C25 nStatus 1V

I have five EP3C25 borad, 3 of them are working well. But the rest 2 will sometimes boot fail. The working mode is AS or fast AS from EPCS4. There're 10K pull up on nStatus, nConfig, Conf_done, MSELs...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Could you look at those signals with a scope instead of a voltmeter?

Which package is it? If it's a EP3C25E144 you must check that the chip's exposed bottom pad is properly soldered to ground.