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Routing Guidelines for High Speed Serial links ?

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3Deye

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Hi,

I mainly want to ask about the Frequency of serial links like RocketIO or RapidIO, I read data rates of 3Gbps (Giga bits per second), does that mean that the frequency on the trace is 3GHz ?! What is the difference between "bps" and "Hz" ?!

I need some PCB design guidelines and application notes for RocketIO and/or RapidIO?

Thanks
 

This could help:
**broken link removed**
**broken link removed**

Most importantly do a thorough pre-layout SI simulation. Make sure you have the correct models for all devices and most importantly connectors. And then decide upon the layout topology
 

Look at the waveform. The maximum frequency is 1.5 GHz in a rough estimation. Layout guidelines are basically the same as with other high speed serial links (SATA, PCIe). Some have been posted at Edaboard before.
 

At such high speed serial links, challenges are to length-match the differential pairs, proper placement of termination resistors and taking care of signal strength (pre-emphasis and equalization) and taking care of switching times. As FvM mentioned, most of the serial links will have similar layout guidelines. Just have a look at this thread https://www.edaboard.com/threads/126630/, a document on PCIe design guidelines in that thread can be of some help
 

Thanks cks3976 and FvM.

What are the tools required to do simulation at these frequencies? I am already using Mentor Graphics HyperLynx to do signal integrity analysis for signals at up to 150Mhz, but in the GHz range, is it enough?

And sorry I didn't get it, How can I calculate the frequency (Hz) from the data rate (bps) ?
 

3Deye,


According documment bellow, this tool includes cross-talk simulation, wich is very important at this spectrum frequency :
**broken link removed**

+++
 

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