Shenzhen BIGTREE technology co., LTD.
BIG TREE TECH
Installation size：This motherboard perfectly replaces the original Ender
3 motherboard, please refer to BTT SKR MINI E3 V1.2 SIZE for details
Microprocessor：ARM Cortex-M3 CPU
Power Voltage：12/24V
Motor Driver：Integration of TMC2209 UART mode
Motor drive interface：XM、YM、ZM、EM
Temperature sensor interface：TH0、THB，2 channel 100K NTC（thermal
resistance）
Display：2.8”TFT、3.5”TFT、Ender 3 original LCD12864 screen
PC communication interface：mini-USB-type B,easy to plug,
communication baud rate of 115200
Support file format: g-code
Recommended software:
Cura,Simplify3D,pronterface,Repetier-host,Makerware
Indicator Light information
After the board is powered on：
The red light D3 is power indicator light. The red light flashing
shows the power supply is normal.
Red light D10 is status indicator light. D10 flashes when user
update the firmware, and closes when the update is complete.
Green light D6 is hot bed HB status indicator light. The hot bed is always
bright when heated and extinguished when not heated;
Green light D4 is the E0 state indicator light of the heating rod. D4 is
always on when the heating rod is heated, and it is off when it is not heated;
Green light D5 is the CNC fan FAN0 status indicator light. D5 will be on
when the fan is turned on, and off when the fan is off.
BTT SKR MINI E3 V1.2 Motherboard and
Computer Connect
The motherboard connects with the computer via the USB interface.
After the driver is installed, the motherboard can be inserted into
the computer to recognize the port for data transmission.
The driver can be obtained from our open-source website:
https://github.com/bigtreetech
Download the file named mapleDrv for installation.
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