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SKR MINI E3 V3.0 Features:
32-bit Processor STM32G0B1RET6/STM32G0B0RET6
Larger heatsink
Built in TMC driver
More expansion ports
More information can be found here:
https://github.com/bigtreetech/BIGTREETECH-SKR-mini-E3/tree/master/firmware/V3.0
FYI,
Thanks for Sean, it is found that the official firmware does not have the proper pins for BL touch (or CR touch).
You can download the firmware with correct pins here