Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
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

Thank you for your reply.

Actually, I read the voltage from the measurement of a scope, not from multimeter. The nStatus will go to 0V as soon as I press the nConfig to ground, then it will rise to 1.1V after release of nConfig.

The package I'm using is QFP240, which has no gound pad in bottom.