[time-nuts] No State Of The Art Counter

Gerhard Hoffmann dk4xp at arcor.de
Thu Jan 6 22:54:05 UTC 2011

Am 06.01.2011 22:45, schrieb Gerhard Hoffmann:
> I was thinking about abusing the built-in SERDES-Units in the Spartan6 
> as a prescaler. It would
> be necessary to sort out the transitions after the 1:16 gearbox, but 
> given the amount of logic in a Spartan6
> that should be possible. While I have not seriously tried that, I have 
> spotted no show stopper
> in the data sheet.
> The SERDES units are used for PCI-express, USB3 or fiber optic links 
> otherwise.
> It should be possible to reach 3 or 4 GHz.
To clarify this:

That would not be a prescaler but a full range extension.
Timestamping would be possible at 3 or 4 GHz.

And I meant SATA-3, not USB3.


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