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Altera_Forum
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15 years ago

Problem with CRC Error Functionality, JTAG/AS Config Scheme

Hello all, Currently I have a system arranged to use both the active serial and JTAG configuration schemes, laid out as specified in the Cyclone III handbook(figure 9-29). I'm using a Cyclone ...
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Altera_Forum
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12 years ago

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I understand the power sequencing in the Cyclone III's is very flexible, but are there any problems with shutting down just the 1.2V core voltage for ~20ms to cause the power cycle/reconfigure?

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The handbooks usually have a statement along the lines of "if you cannot meet the power-on power supply sequence requirements, assert nCONFIG until power is stable".

For your case, I'd recommend holding nCONFIG low, power-cycling the core voltage, and then release nCONFIG. If that works, then you have a solution that is consistent with the handbook recommendations.

Cheers,

Dave