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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

I'm not sure... the manual doesn't say anything about being able to change the MSEL pins before a reconfiguration, and even insists on the fact that they should only be directry connected to ground or VCCA and not controlled by an external component. This could indicate that the MSEL pins are only read once, at the beginning of POR (or that they aren't registered at all...)