• State Resolved
  • Locked Locked
  • Replies 6 replies
  • Subscribers 31 subscribers
  • Views 275 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

TM4C129ENCPDT: use with USB-3

Karen Nashold
Prodigy 30 points
Part Number: TM4C129ENCPDT

Can a USB-3 thumb drive be used with the TM4C129ENCPDT?  Currently, it only seems to read USB-2 drives?  Is this a problem in our firmware or a fundamental limitation of this microcontroller?

Thanks,
Karen

  • 0
    TI__Guru*** 133205 points

    Hello Karen,

    TM4C devices do not support USB 3.0. I am not even sure if USB 3.0 was even a released standard when the USB interface was designed.

    USB 2.0 high speed requires an external USB PHY, we have a TI Design showing this: http://www.ti.com/tool/TIDM-TM4C129USBHS

  • 0 in reply to Ralph Jacobi
    Guru 117855 points

    Ralph Jacobi said:
    I am not even sure if USB 3.0 was even a released standard when the USB interface was designed.

    USB 3.0 arrived 'well after' these 'other' MCUs had been introduced.    (Poster could have 'investigated' for such data...)

    It is (sometimes) possible for the 'Most Recent Standard' to make 'Special Accommodation' for those 'Past Standards.'    Poster may wish to turn her attention to the new USB Spec - to determine if that capability exists.    However - many (even most) of the advantages gained thru USB 3.0 - are likely to be 'dulled' (even lost) - when 'switching 3.0 into 'Accommodation Mode.'   (if such truly exists - Staff here is divided...)

    Poster appears to have three paths:

    • employ her 'other' MCU (maybe) w/'dumbed down' ver. of USB 3.0.    (assuming such exists)
    • employ her 'other' MCU (surely) w/those USB Drives, 'Known to have succeeded here.'
    • graduate to a far 'newer' MCU which 'informs & advises' USB 3.0 capability

  • 0 in reply to cb1_mobile
    Prodigy 30 points

    Thanks.  USB-3, we read, is supposed to be downward compatible, but we haven't investigated yet exactly what that means.  For the time being, will stick with USB-2.

  • 0 in reply to Karen Nashold
    Guru 117855 points

    Thank you - although another, 'Splash of Green' - to reward more thorough guidance - appears earned.

    Might your 'real issue' be:  'How much is gained (if anything) by the Switch to '3.0's Downward Compatibility Mode' - and at what cost?'

    Progress sometimes - yet not always - makes sense.

    Do note that USB 3.0 (when Not 'dumbed down') offers 'MANY GREATLY IMPROVED & EXTENDED CAPABILITIES!'

    When 'dumbed down' - might you find yourself, 'Unable to deploy - thus benefit - from those multiple improvements?'    That's critical - clearly warrants your consideration -  does it not?

    Good luck on your hunt...    Firm/I expect that USB 3.0 will become (even a further) 'necessary evil...'

  • 0 in reply to cb1_mobile
    Prodigy 30 points

    Oh, I agree with you, but not right now.  Maybe the next iteration. :-)

  • 0 in reply to Karen Nashold
    Guru 117855 points

    Karen Nashold said:
    Oh, I agree with you, but not right now. 

    Indeed - Mañana lives (even thrives) - yet too often is 'postponed!'