I'm looking for this informations too.
It seems on the ATMEGA328 it's "DX 9 PD5/PCINT21/OC0B/T1"...
but I have no idea if it is possible to connect a switch there.
Posts made by Pookas
Stepmotor Module - Hard Limit
I'm working on a project with the M5Stack Core and the Stepmotor Module.
GRBL 0.8c is pre-installed on the Module. It offers a "Hard Limit" Option ($16=1) to set a switch that turns off the motor when the "Home" Position is reached.
Usually the Pin for the X-Motor-Hard-Limit would be "D9" on an Arduino. Does any one know how to connect an End-Switch on the Stepmotor Module since there is no D9 Pin?