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4D-UPA Schematic wrong

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  • 4D-UPA Schematic wrong

    I have confirmed that the TX and RX signals out of the CP2104 shown on page 7 of the 4D-UPA datasheet are backwards. I wonder how a board made from this schematic could have worked.

  • #2
    Hi,
    Yes the 4D-UPA REV 1.1 hardware had the TX/RX backwards, but it was never publicly released.
    For some reason the 4D-UPA datasheet itself never got updated with the REV 1.2 hardware schematic, which is what is being shipped, not the REV 1.1.
    It was updated in the gen4 datasheets, but not in the 4D-UPA datasheet itself. oops.
    This however has already been corrected with the new release of datasheets coming very soon.

    Sorry about that.
    Here is the latest REV 1.2 schematic for your reference. REV 1.2 has been shipping for well over a year now.
    Attached Files
    James

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