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Thread: how to access the USB client pins D+ and D-

  1. #1
    Junior Member
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    how to access the USB client pins D+ and D-

    I'm currently using the Teensy 3.6 and I access to the client USB D+ and D- pins through the pads located on the bottom side below the usb micro connector.
    I want to use the Teensy 4.1 but I can't find a way to access the above mentioned USB pins.
    Paolo

  2. #2
    Senior Member+ defragster's Avatar
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    T_4.1 has similar 'device' USB under the USB micro connector. They are smaller 'circle' pads for D+ and D-.

  3. #3
    Quote Originally Posted by paoloboatto View Post
    I'm currently using the Teensy 3.6 and I access to the client USB D+ and D- pins through the pads located on the bottom side below the usb micro connector.
    I want to use the Teensy 4.1 but I can't find a way to access the above mentioned USB pins.
    Paolo
    I had the same problem with a Teensy 4.0. I do not know if the 4.1 is the same, but in my project the 4.0 will be inside a box with a USB panel mounted jack. As someone else mentioned in another thread, what I did was cannibalize a USB cable, plug it into the jack on the 4.0 and solder the other end to the panel mounted jack.

  4. #4
    Senior Member+ KurtE's Avatar
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    When I was doing a one off box, I used something like: https://smile.amazon.com/CERRXIAN-Fe.../dp/B07G4XYJ5W

  5. #5
    Senior Member+ defragster's Avatar
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    On the T_4.0 as @OhioJim discovered the device USB is only on the attached connector, and the similar under pads on the T_4.0 are for USB_HOST. Larger T_4.1 size like the T_3.6 the USBHost pins are in the same place.

    PJRC shipped the T_4.1 with those smaller USB Device pads to make them available with the expectation they would be usable even at the higher 480Mbps speed it provides.

  6. #6
    Senior Member PaulStoffregen's Avatar
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    Adafruit sells one too.

    https://www.adafruit.com/product/937

  7. #7
    Senior Member PaulStoffregen's Avatar
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    About those pads on the bottom side of Teensy 4.1

    Click image for larger version. 

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