Shenzhen Big Tree Technology CO.,LTD .
BIG TREE TECH
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16.
2 method for CAN connection:USB & XH2.54 6Pin，USB port CAN/USB mode is
selected by switches.
1.2 Specification
1.
Dimention：110*85mm, for details please refer to：BIGTREETECH SKR 3-
SIZE.pdf
2.
Mounting pattern：102*76mm
3.
MCU：
ARM Cortex-M7
STM32H743VI
4.
EEPROM：24C32 32Kbit
5.
Voltage in：DC12V-DC24V
6.
Logic voltage：DC 3.3V
7.
Heater connection：Heated bed（HB）
、heater cartridge（E0、E1）
8.
HB port max current：10A continuous ，11A instantaneous
9.
Heater cartridge max current：5.5A continuous，6A instantaneous
10.
Fan port：3 X CNC(selectable voltage) ,2 X always on(PSU voltage)
11.
Fan port max current：1A continuous，1.5A instantaneous
12.
Overall max current(HB+E0+E0+All fans):10A
13.
WIFI connection：ESP-12S、ESP-07S、ESP32
14.
Expansion port：BLTouch（Servos、Probe）、PS-ON、PWR-DET、Fil-DET、RGB、CAN
FD
15.
Steppers supported：TMC5160、TMC2209、TMC2225、TMC2226、TMC2208、TMC2130、
ST820、LV8729、DRV8825、A4988 etc.
16.
Stepper driver mode：SPI、UART、STEP/DIR
17.
Stepper motor socket：X、Y、Z（双 Z 轴）、E0、E1 5 channels in total
18.
Thermistor: 2 X thermistor port(NTC/PTC selectable)
19.
Display：Serial、SPI、LCD
20.
PC connection：USB A
21.
Supported file format：G-code
22.
Supported kinematics：Cartesian、Delta、Kossel、Ultimaker、CoreXY
