Motor controller with Teensy 3.1

[bambuk]

I need to drive a BLDC controller using Teensy 3.1. The rotation direction pin is described like this:

TTL-CMOS Compatible
Logic “0” = 0-0.8VDC
Logic “1” = OPEN

How do I control it using a Teensy digital pin (e.g., can I connect it directly to the Teensy digital pin)?

Thanks.

 

[PaulStoffregen]

You can probably use pinMode(pin, INPUT) to put the pin in "open" mode, and digitalWrite(pin, LOW) and pinMode(pin, OUTPUT) to drive it low.

It's also possible, but not as simple, to configure Teensy 3.1 pins into open drain mode. Details here:

http://forum.pjrc.com/threads/25393...sy-3-1-processor?p=44249&viewfull=1#post44249