• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 33 subscribers
  • Views 283 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TUSB2046B: USB Memory Recognition Fail

May
Genius 9880 points

Part Number: TUSB2046B

Hi,

Customer is encountering problem regarding the device. Below is the summary.

Problem
1) The mouse and keyboard recognize, but not the USB memory stick.
2) It is recognized when connecting a memory stick by connecting a USB HUB to the outside.

Mouse & Keyboard <--> TUSB2046B <--> Processor : recognize
Memory Stick <--> TUSB2046B <--> Processor : Unrecognizable
Memory Stick <--> USB HUB <--> TUSB2046B <--> Processor :  recognize

Thank you in advance.

Regards,
Maynard

  • 0
    TI__Guru 60870 points

    Hi Maynard,

    Can you confirm if the hub is configured in buspowerd mode or selfpowered mode?  If it is in buspowered mode, please try switching to selfpowered mode.  What is the bus state on DP/DM when the memory stick is connected?

    Regards,

    JMMN

  • 0 in reply to JMMN
    TI__Genius 9880 points

    Hi JMMN,

    Thank you for your respons, below is the reply of the customer.

    I'm using self-powered mode.
    What does the second question mean?

    Best regards,
    Maynard

  • 0 in reply to May
    TI__Guru 60870 points

    Hi Maynard,

    Can they check what signaling is occurring on the downstream port DP/DM lines when the memory stick is connected?

    Does the host report any error messages?

    Can the customer confirm that VBUS stays above 4.75V when the memory stick is connected?

    Regards,

    JMMN