topic Re: TWR-K64 USB Demo Problem in Kinetis Software Development Kit

TWR-K64 USB Demo Problem

aroplane — Wed, 08 Nov 2017 21:55:00 GMT

Hi,

I have a TWR-K64 board and going to do usb test. I am trying to use the demo project "usb_examples-usb_device_cdc_vcom", but I don't know how to set the jumpers. There is a readme.pdf in usb_examples-usb_device_cdc_vcom->bm. I read it and got confused. Please look at the captured picture below. It says, J29 3-4, Remove all jumpers from J19. I did so, but there is no power supply any more on the board. I am wondering, how the internal regulator will output without an input?

Also, 2. Connect the target board to the external power source (the example is self-powered). Dose it mean the TWR-K64 needs an external power supply, say from tower boards? If so, could you please tell me how to set the jumpers to make this usb self-powered to get an external power source? Thank you very much!

Re: TWR-K64 USB Demo Problem

danielchen — Thu, 09 Nov 2017 07:28:53 GMT

Hi Lei Peng

Please refer to my settings,

J29: 3-4

J19: 1-2

Have a great day,
Daniel

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

Re: TWR-K64 USB Demo Problem

aroplane — Thu, 09 Nov 2017 13:45:10 GMT

Hi Daniel,

I made it running as per your setting. The document misled me. It should be updated.

Thank you very much!

Best regards,

Lei Peng