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Thread: Reset Teensy 3.2 from another Arduino

  1. #1
    Junior Member
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    Reset Teensy 3.2 from another Arduino

    I want to reset / reboot - without programming - a Teensy 3.2 from another Arduino (espacially Arduino Pro Mini).

    How to do this? Can I use the reset pin on the backside of the Teensy?

    If yes, is the reset pin per default low or high e.g. how to set the digitalWrite on output pin on the Arduino?
    May I have to use any pull-up or pull-down resitors?

  2. #2
    Senior Member+ Theremingenieur's Avatar
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    The reset pin is high per default and must be pulled LOW to reset. Rebooting starts after the pin goes high again. A weak pull-up resistor is in place.

    I'm not sure if the RESET pin on the bottom is 5V tolerant - take care!

  3. #3
    Senior Member PaulStoffregen's Avatar
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    The reset pin is NOT 5 volt tolerant.

    If you use it from a 5V Arduino, do not drive the pin high. Only drive it low, and use pinMode() to release control of the pin. There's a pullup resistor in the chip on Teensy, so the pin will go back to 3.3V when you aren't driving it low.

  4. #4
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    Is the pull-up resistor of the reset pin set by default or must I do this manually? If yes, how is the number of the reset pin ( pinMode(xxx, INPUT_PULLUP) )?

  5. #5
    Senior Member+ Theremingenieur's Avatar
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    The pull-up resistor is there by default.

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