Teensy 3.5 and internal pullups etc

[Marcwolf]

Hi.
I just want to confirm that the 3.5 has internal pullups on digital input lines.. especially pins 54-57. I intend to put a small switch block there to set various start-up activities.

Also as I will be using an Adafruit PWM 16 Servo card does anyone have any things I should watch out for.

Is there any issue with using the extra Serial ports.. I will be using the Arduino IDE for development

Very excited to be using this new board as I have loved the 3.2 in the past


Many thanks
Dave

 

[GremlinWrangler]

Check the source if you want to double check but all the non special pins should have pull up and pull down hardware.

Nothing specific with using the multiple serial ports, though the higher number ones have shallower hardware buffers and default to smaller software buffers. The latter is changable if data stream is fast and your code can't check back often enough.

 

[PaulStoffregen]

Should work fine. SDA & SCL need real pullup resistors, but Adafruit's board has them.

I recently used this same chip, but on a custom board and with my own code (not Adafruit's lib). Worked fine.

https://oshpark.com/shared_projects/jiW2r6f5