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Altera_Forum
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8 years ago

cyclon does not load

HI, I have an architecture with: - cyclon iv ep4ce6e22c8n with a programming chip epc64n it is a new release of an old schematic working fine, just the PCB was changed. I am able to load wit...
Altera_Forum's avatar
Altera_Forum
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8 years ago

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HI,

I changed the pull-up and down with 10Kohm resistor.

nothing is changed.

please let me suggest more

mauriio stefani

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What about the MSEL[2:0] lines? You show both a 4.7K pullup to VCC and a pulldown to GND on each line. Obviously only one resistor of the pair should be populated per line.

So what is the resistor stuffing selection on your MSEL[2:0] lines? For AS at 3.3V MSEL[2:0] should be either hi/lo/hi or lo/hi/lo depending on fast or standard POR.