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Altera_Forum
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18 years ago

USB Blaster Rev. B compatibly with Cyclone III Starter Board???

I am working with the Nios II Emb. Eval. Kit Cyclone III Edition and I am trying to configure the FPGA by USB Blaster Rev. B (taken from an Cyclone II Dev. Kit). But the connection is very unstable. ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

I am a bit confused as the R14 is already a 100 Ohm resistor?! Nevertheless I have absolutely no idea where the problem could come from? So lets exclude some things...

- configuration scheme should have nothing to do with it (AP or PS)

- unused pins should be set to input tri-stated

What about the DP-Pins? Because the QII Help tells me for me conf_done error message, that there might be a problem with the NCE pin (not at GND)???