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Transient in IMX6SL USB causes USB to Fail

Question asked by jparrish88 on Apr 29, 2015
Latest reply on Apr 29, 2015 by igorpadykov

Hello,

 

We are using the demo board for the IMX6SL. As a reference for our own board. All the diodes and suppressors are the same.

 

When we perform a Electrical Fast Transient on the USB cable (feeding into USB_OTG1) the USB port stops performing. The USB controller refuses to hand shake.

Both DP and DN of the USB controller is routed to a: SRV05-4 RailClamp® Low-Capacitance TVS Diode Array | Semtech.

 

The processor still works, all other ports work fine. The only issue is no hand shaking with the host over USB.

 

Has anyone run into this problem? Any help would be appreciated.

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