Question about i.MX6 errata ERR010822.

cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

Question about i.MX6 errata ERR010822.

Jump to solution
554 Views
takayuki_ishii
Contributor IV

Hello community,

I have one question about errata No. ERR010822 in document of IMX6DQCE Rev 7.

It say that, this problem will be occur 

   "when two or more hubs are between the USB host and device."

The other hand, it say that

The issue does not occur

    "without a hub connection"
 because there are no additional bits after EOP.

If it have one hub connection between the USB host and device, 

This errata will be occur or not?

Is it meen that

 "without a hub connection"    = one root hub

 "when two hubs connection" = one root hub + one additional external hub

correct?

Best regards,

Ishii.

Labels (3)
0 Kudos
1 Solution
447 Views
art
NXP Employee
NXP Employee

This is just the confusing explanation of this errata. The actual meaning is as follows.

Under rare conditions, the USB controller operating in host mode may fail to respond to an incoming packet from a device when two or more external hubs are connected between the USB host and device. The issue does not occur with one or no external hub connection.


Have a great day,
Artur

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!

- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
-------------------------------------------------------------------------------

View solution in original post

0 Kudos
2 Replies
448 Views
art
NXP Employee
NXP Employee

This is just the confusing explanation of this errata. The actual meaning is as follows.

Under rare conditions, the USB controller operating in host mode may fail to respond to an incoming packet from a device when two or more external hubs are connected between the USB host and device. The issue does not occur with one or no external hub connection.


Have a great day,
Artur

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!

- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
-------------------------------------------------------------------------------

0 Kudos
447 Views
takayuki_ishii
Contributor IV

Hello Artur,

Thank you for your answer.

Situation of using one or no external hub  are excluded from this issue.

Best regards,

Ishii.

0 Kudos