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Altera_Forum's avatar
Altera_Forum
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10 years ago

Can I connect c0 and c1 from ALTPLL directly to pins in MAX10?

Hi all, I'm want to test the PLL outputs for a nios system in a MAX10 fpga. I was told in another thread that I needed to add a clock bridge to simultaneously connect the output (c0 or c1) inte...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Glad you're up and running.

Your 50MHz 'square' wave is likely not to look like a square wave due to limitations of your oscilloscope. What is the bandwidth of your oscilloscope? If it's only 100MHz or so then your 50MHz wave square wave shape is likely to be rather sinusoidal.

If your scope is a little better (500MHz+), and the waveform still looks a little rubbish, then you are probably loading the clock too heavily.

I trust your 5kHz square wave looks as you'd expect...

Cheers,

Alex