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akras  
#1 Posted : Tuesday, March 28, 2017 7:17:06 PM(UTC)
akras

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I'm supplying 5.25VDC to the Vd pin of the output header of my Cronus, and I see approximately 5V master clock signal output (very nicely shaped).

My question: is the 5V master clock signal normal (I sort of expected that the output buffers will be fed from a local 3.3V regulator, and expected a 3V signal) or the regulator feeding the output buffers is not doing its job and my board is going to die at any moment now?

Thank you.

Andrey

Edit: A strange thing has happened: I didn't change anything, but at some point it went to the expected 3.2V (and the rise time went from 3 ns to about 5 ns)... The waveform is about the same. Strange, but I can live with that.

Edited by user Wednesday, March 29, 2017 2:14:53 AM(UTC)  | Reason: Not specified

Russ White  
#2 Posted : Wednesday, March 29, 2017 6:13:28 PM(UTC)
Russ White

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~3.2V is normal - 5V would never be normal - it would mean that the VREG was not regulating or shorted etc..
thanks 1 user thanked Russ White for this useful post.
akras on 3/29/2017(UTC)
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