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Thread: Teensy 4.0 Pin Current Capability

  1. #1
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    Teensy 4.0 Pin Current Capability

    Hi all,

    I can't seem to find a reliable answer for the current capability (source/sink) of the I/O pins on the Teensy 4.0.

    I thought that info would be in here:

    https://www.pjrc.com/teensy/IMXRT1060CEC_rev0_1.pdf in table 22 (page 34), but no luck.

    There's a table on the PJRC site, but I know updating it is a much lower priority job than all the programming and designing, so it's a bit out of date.

    I'm sure I'm missing this somewhere simple, I just can't for the life of me figure out where.

    Thank you!

  2. #2
    Senior Member PaulS's Avatar
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    You need to get the latest IMXRT1060 datasheet from the NXP website.
    See the updated table 22 for output currents.

    Paul

  3. #3
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    Ah, thank you very much Paul!

    So based on this I'm seeing 4ma? Am I reading that right?

    Thank you!

  4. #4
    Senior Member PaulS's Avatar
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    Yes, that's what I read as well when the Drive Strength (DSE) setting is '111'. But I have no idea what the actual DSE setting is or how/where it can be set.
    I think it's defined in C:\Program Files (x86)\Arduino\hardware\teensy\avr\cores\teensy4\co re_pins.h [line 434] but I'm not sure. Perhaps Paul Stoffregen knows?

    Paul

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