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  • About

    Covering the latest trends and topics in USB IP.

    I started working on USB in 1995, starting with the world’s first BIOS that supported USB Keyboards and Mice while at Award Software. After a departure into embedded systems software for real-time operating systems, I returned to USB IP cores and software at inSilicon, one of the leading suppliers of USB IP. In 2002, inSilicon was acquired by Synopsys and I’ve been here since. I also served as Chairman of the USB On-The-Go Working Group for the USB Implementers Forum from 2004-2006.

    I received an M.B.A. from Santa Clara University and an M.S. in Engineering from University of California Irvine, and a B.S. in Engineering from the University of Minnesota. I’m a licensed Professional Engineer in Civil Engineering in the State of California
    - Eric Huang

Why we need 10G USB (Double-Speed USB 3.0)? – Revisited

Posted by Eric Huang on May 14th, 2013

As we enter the next era of USB, the 10 Gbps one, I’m asked constantly, why does USB need to go any faster?

Answer:  Users expect Instant On, fast access to everything.  This means you need lower latentces, and faster access to everything inside and outside your device, tablet, phablet, or phone.

If you have a notebook PC or ultrathin PC or ultrabook, it will have limited space. You have the option of having an external wireless or wired drive.

You can read about the two wireless options which are:

  1. In-Home (or Office ) cloud using a Router and USB 3.0 Drive or
  2. Using a stand alone wireless drive or portable cloud

Both are great options for wireless, but still limited by the speed of WiFi-N today. (I’d call those “Wireless Network Attached Storage” or “WNAS”. )

 Even with WiFi-AC coming now at 867 Mbps, USB 3.0 can deliver 4-5x those speeds.  You will need the option of connecting to fast external storage or Direct Attached Storage DAS using a wired interface at not just 5 Gbps, but 10 Gbps at least.

Why 10 Gbps?  Aren’t spinning hard drives rate limited by the mechanics?

Well yes, they are.

But, since you’ve read all my articles and blogs, you know that faster, cheaper SSDs are coming.  And you will be able to buy Terabytes of storage for external DAS and you will want to access lots of data quickly, as fast as if it was inside your device.
Aside:  Most importantly, in my mind at least, you will likely carry around a USB 3.0 Flash Drive that  is about 500 GB in size that will be your back up for all your files.  It might be a wireless drive in your backpack.  Certainly, you will have the cloud. You will have a USB 2.0 Flash Drive for file transfers of small sizes, but the option of carrying lots of your files, and having super fast access to it will be too cheap and too useful for most users to pass up.

Back to 10G USB.  A fast wired standard will be needed.  10G USB will be it.  It’s boring, but it’s true.  One interface to rule them all.

Here’s the original interview with Jeff Ravencraft, COO of the USB Implementers Forum, discussing Double-Speed USB 3.0, what I like to call 10G USB

Hopefully it will be embedded below.

AND there is this innovative company pushing Thunderbolt 2 at 20 Gbps.  I could be wrong, but an open alternative that is at least 1/2 that speed might be useful.

 

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Nothing funny today.  Maybe tomorrow.

This post is meant to bring some new readers up to speed (hahahahaha). So if you know all of this, congratulations. You are the only one to have read all 3 of my blog posts this year.

Yeah, that wasn’t funny either.

 

 

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