If the motherbord your receive version is BIGTREETECH-SKR-mini-E3 V1.0, please check the document which is in the firmware and hardware files.
If the motherbord your receive version is BTT SKR mini E3 V1.2, please check the document which is in the firmware and hardware files.
The factory-installed motherboard will be equipped with firmware for testing (Ender3 models), which can be used directly or as needed.
BIGTREETECH SKR-mini-E3 motherboard is the 3D batting of ShenZhen BigTree Technology CO.,LTD
An ultra-silent, low-power, high-quality 3D printer master board launched by the printing team.
Specially for Ender 3 printer to update.
More detailed information about SKR MINI E3 you can visit this website:
Motor Parallel Module：