AnsweredAssumed Answered

i.MX6 USB host controller doesn't respond

Question asked by torus1000 on Mar 30, 2016
Latest reply on May 13, 2016 by torus1000

Hi,

 

We checked i.MX6 USB communication between two Sabre-SD boards as following.

MCIMX6Q-SDB/host----HUB1----HUB2---MCIMX6Q-SDB/device(otg)

Unfortunately host controller didn't respond immediately after IN token packet transaction ended.

Please see marked "No handshake" in screen capture of USB analyzer.

usb_ana.png

According to the USB2.0 specification, there are several cases of no respond (see below) but we want to debug ASAP.

Can you give us some advise to debug such issue smartly?

 

Is there any particular conditions or states of i.MX6 USB host controller which cause no respond?

 

Is there any errata related this issue?

 

Thanks.

 

spc1.gif

spc2.gif

spc3.gif

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