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Old 11-09-2007, 07:42 PM
ZHI
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Default What the 'c2p' and 'c2o' stand for?

There is a timing diagram comparison between using DCM and not using
DCM in http://www.xilinx.com/products/desig...management.htm

I don't know what the 'c2p' and 'c2o' mean here. The result I found
is 'c2p' stands for Military DC-DC Power Supplies and 'c2o' is 1.8,
2.5, 3.3, 5.0 volt CMOS Oscillator. It looks not good. Does anybody
know the meaning of them exactly good for explaining in the diagram.
Many thanks.

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Old 11-09-2007, 08:08 PM
John_H
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Default Re: What the 'c2p' and 'c2o' stand for?

"ZHI" <[email protected]> wrote in message
news:[email protected] ups.com...
> There is a timing diagram comparison between using DCM and not using
> DCM in
> http://www.xilinx.com/products/desig...management.htm
>
> I don't know what the 'c2p' and 'c2o' mean here. The result I found
> is 'c2p' stands for Military DC-DC Power Supplies and 'c2o' is 1.8,
> 2.5, 3.3, 5.0 volt CMOS Oscillator. It looks not good. Does anybody
> know the meaning of them exactly good for explaining in the diagram.
> Many thanks.


Interpret them as "Clock to Pad" where the reference is to the external
clock and "Clock to Output" where the reference is to the internal clock.
This is not an "industry standard" notation of any kind because, frankly,
there are no industry standards for this kind of stuff. The author probably
took a little more liberty in the diagrams than most would.

- John_H


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