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Altera_Forum
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11 years ago

Arrow SoCKit: HSMC_REF_CLK (100MHz) Not Working

@moderator: I found one other thread in this former that mentioned the HSMC_REF_CLK on the Arrow SoCKit and managed to post my question there, but (1) that was somewhat rude to hijack this persons th...
Altera_Forum's avatar
Altera_Forum
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11 years ago

Thanks for the input! We were hoping to make this quick and easy without having to configure the device, but that may change :-)

However, we do have a new data point that suggests the Si5338 device is working properly. When we do not include Pin 9 as an input in the Quartus design file and probe the resistor, the 100MHz clock is working. So something in the Quartus design file is driving the input low... to my knowledge, we have set everything up the way it is supposed to be (as mentioned above). Just for sanity checks, I've tried every I/O standard, and different settings within the Pin Planner, but still no change.

Maybe we should start from square one, because I feel I might be overlooking something obvious: If one were to use a differential clock, how would configure their Quartus design file? Let's start there...