TMC2209 Realtime sensorless homing trigger voltage test stall guard

I wanted to see what the TMC2209 was sending back to marlin to initiate or trigger the end stop. I was expecting to see 5V return to the end stop pin. Let me know what you guys think.

TMC2209 Driver
https://www.amazon.com/gp/product/B07ZPYKL46/ref=as_li_tl?ie=UTF8&tag=fintechcomm0f-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B07ZPYKL46&linkId=078d6b12abd18cdf36e9683bebf2acb6