Use TB for Filament Runout.

[supernacheitor]

I'm using the TB pin for using a endstop for filament runout. The filament sensor runs perfectly but the TE pin don't read the extrusor temperature when I plug the endstop in TB. Can't I use this pin for a filament runout sensor? Otherwise, is there any other pin on the board that I can use?

//#define TEMP_BED_PIN 39 // Analog Input
#define FIL_RUNOUT_PIN 39 // RUNNOUT FILAMENT PIN

Thanks.