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Altera_Forum
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17 years ago

Cyclone III AS Configuration

Hello, I am having some problems getting AS configuration working with my Cyclone III FPGA. I am using an EPCS16 for the configuration chip and the C3 is a EP3C25F324C8N on a custom board. Th...
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Altera_Forum
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17 years ago

To prove my oscilloscope is configured correctly I've used the same probe to measure the output of a 50 MHz crystal oscillator I have on the board. Here is a plot of that output.

I agree that the rise and fall times are pretty large but that must be from some other capacitance. As I mentioned, my circuit is identical to Figure 10-29 in the Cyclone III handbook. Any ideas what's going wrong?

http://www.stanford.edu/%7Eadprice/3.bmp

http://www.alteraforums.com/forum/www.stanford.edu/%7Eadprice/3.bmp