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USB OTG disconnect the USB Host device might slow problem.

Question asked by Takashi Takahashi on Sep 28, 2016
Latest reply on Oct 6, 2016 by Takashi Takahashi
Branched to a new discussion

Dear community.

Our customer has question below.

 

When using   OTG port of  USB Function in i.MX6DL , there is a problem that the cutoff measure when disconnect USB Host device  is slow.
When the source cord was confirmed, it was the following cord.
It's defined as 155ms-200ms on Spec in USB OTG defined by usb.org, but their system is 500ms setting.


I think there is no problem even in the 155ms according to the Spec. Or it will become a problem because it is set to 500ms in the relationship of the electrical characteristics of i.MX6.


[Source cord]
/* B-Idle to A-Disconnect */
#define TA_BIDL_ADIS         (500)        /* TA_BIDL_ADIS: section 5.2.1
                                         * 155ms ~ 200 ms (but not enough)
                                         */

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