Port Array Module pull up

ckopec

Josh,

I really like the addition of the 22k pull up resistors on the new Bpod v2.3. Is there any plan to modify the PCB for the port array module to add equivalent pullup resistors?

Thanks
Chuck

Josh

Hi Chuck,

On the port array module, the lines are stabilized using the Teensy's internal pull-up resistors, configured in Arduino with pinMode(N, INPUT_PULLUP).
This is possible on Teensy 3.2 in our application because the 3.2's input channels are 5V tolerant. On boards using Arduino Due or Teensy 3.6 (e.g. State Machine r0.5-1.0, r2.X), the CD4050BDR IC down-shifts incoming 5V logic from the port to 3.3V level - so that IC's inputs require external pull-up resistors.

-Josh

ckopec

Josh wrote[quote='Josh' pid='1457' dateline='1588778185']
Hi Chuck,

On the port array module, the lines are stabilized using the Teensy's internal pull-up resistors, configured in Arduino with pinMode(N, INPUT_PULLUP).
This is possible on Teensy 3.2 in our application because the 3.2's input channels are 5V tolerant. On boards using Arduino Due or Teensy 3.6 (e.g. State Machine r0.5-1.0, r2.X), the CD4050BDR IC down-shifts incoming 5V logic from the port to 3.3V level - so that IC's inputs require external pull-up resistors.

-Josh

Awesome. Thanks