To USB or Not to USB


Will USB Type-C burn my device?


I ran into this article online last week, it discusses how a bad USB Type-C cable fried a Google engineers equipment, including a Chromebook Pixel. It also covers another issue when another bad Type-C cable drew too much power from a laptops port killing them. I highly suggest you read the article, but if you don’t have time then in summary; when a low quality, uncertified USB Type-C cable was used the incorrect resistance value for Type-C configuration causes the device to think it’s connected to a 3amp USB Type-C connection. Drawing 3A from a 500mA or 900mA port is not a good idea; the extra current draw damaged both devices. This issues reared its ugly head when using a USB Type-C to USB Type-A uncertified cable.

How do I avoid this you ask!!!!??? The article (and I agree) notes that typically cables from named brands are typically high quality and tested and the USB-IF also maintains a list of certified cables.

Choosing a certified solution is the lower risk path you can take. This is also the best advice to take when selecting USB IP for your next project. A certified USB IP solution reduces the design risk as you have the confidence that the IP has passed rigorous testing in a real world environment. Synopsys just announced that our 10 Gbps USB 3.1 IP has passed USB-IF certification and actually is the first IP solution to pass USB-IF certification. Is you are considering a USB 3.1 design, Synopsys is the lowest risk choice for an IP solution.

  • Synopsys’ 10 Gbps DesignWare USB 3.1 controller and PHY passed all protocol, electrical and interoperability tests to become the first IP to achieve USB-IF certification
  • DesignWare USB 3.1 PHYs consume less than 50 mW power at 10 Gbps speeds in 14/16-nm FinFET process technologies
  • DesignWare USB 3.1 Host, Device and Dual-Role Device Controllers are backward-compatible with DesignWare USB 3.0 software stacks and device class protocols, enabling designers to reuse code and save months of software development time
  • Complete USB 3.1 solution, including, controllers, PHYs, verification IP, IP subsystems, IP prototyping kits and IP software development kits reduce the time and effort of integrating the IP into SoCs

That’s one pretty USB 10G eye

DesignWare USB 3.1 IP Eye Diagram


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(Yay!, Mick’s first USB Blog)

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