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Altera_Forum
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11 years ago

Cyclone III Reset with unrelated HV pulses

Hi All, I have a cyclone III that I am using to filter and process a digitized waveform created from an attenuated high voltage source on the same board. The board takes in up to 15kV and atte...
Altera_Forum's avatar
Altera_Forum
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11 years ago

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Can anyone give me some guidance as to what circumstances would put my FPGA back into configuration mode?

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An FPGA will go into configuration mode if you pulse the nCONFIG pin, or nSTATUS, and possibly CONF_DONE. Check those signals for coupled noise.

The FPGA has a power-on-reset circuit too ... though I'm not sure that it is active after an FPGA has configured ... you could check that the power supply voltages all look clean too.

Cheers,

Dave