BIGTREETECH SKR Pro v1.2 32bit High Performance 3D Printer Control Board

SKR Pro v1.2  Features
1) The main control uses the ARM-level Cortex-M4 series with a 32-bit dominant frequency of 168 MHz STM32F407ZGT6 chip, performance is greatly improved; 
2) Equipped with highly modular open source firmware Marlin2.0, it is convenient for users to DIY and further-development, to avoid the worry of not being able to master the core code; 
3) Visual Studio Code is a powerful development tool for Marlin2.0. Its integrated development environment has the following advantages: it supports online debugging, which is more helpful for product development and performance optimization, and uses C language for development, which is easy to get started. 
4)The PCB board layout is rigorous and beautiful, and it is specially designed for heat dissipation.
5)Using a dedicated power chip, support 12-24V power input,  output current 3A. 
6)With 24V input and the same power, the hot bed current can be reduced to 1/4, effectively solving the heating problem of hot bed MOS tube. 
7) BIGTREETECH-2.8-inchTFT, and BIGTREETECH-3.5-inchTFT color touch screens are compatible, as are LCD2004 and LCD12864 screens. 
8) The system supports Chinese simplified Chinese, English and other languages, which can be switched by itself. 
9)The firmware is upgraded by SD card, which is simple, convenient and efficient. 
10) Support Serial WIFI Online Printing. 
11) 6 motor drives, 3 extruders, 3 CNC fans. 
12) It has the following functions: data can be saved when power is cut off, materials can be discovered when broken, and works can be turned off when finished. 
13) High performance MOSFET tube, better heat dissipation effect. 
14) Using removable fuse to make the replacement process easier.
15) Reserve extended ports of BL Touch, PWM, ADC, UART, I2C and SPI. 
16) Use the power supply option to separate the USB power supply from the switching power supply, which can effectively prevent the computer USB port from being burnt due to a short circuit. 
17) The special function interface uses a color-conspicuous row pin to greatly reduce the error rate of the wiring. 
18) As many as 20 expansion ports can be reserved, and extended ports can be used to add more features to the printer without worrying about the shortage of motherboard ports. 
19)Support offline printing and online printing. 
20) Support for dual Z axis printers (series dual Z)

Motherboard parameters:
1)Appearance size: 147*95mm 
2) Installation size:138 * 86.5 mm 
3) Microprocessor: ARM 32-bit Cortex / M4 CPU 
4) Input voltage: DC12V-DC24V 
5)Motor driver support :TMC5160,TMC2208,TMC2130,ST820,LV8729, DRV8825,A4988, etc. 
6) Driving mode support: TMC2130SPI, TMC5160SPI, TMC2208 UART
7)Motor drive interface: X, Y, Z, E0, E1, E2,total 6 channels. 
8) Temperature sensor interface: T0, T1, T2, T3 total 4 channels 100K NTC .(thermal resistance) 
9) Display screen: BIGTREETECH- 2.8 inch TFT,BIGTREETECH-3.5 inch TFT, LCD2004,LCD12864 
10) PC communication interface: square USB, convenient to plug and unplug, communication baud rate is 11520 
11) Support Expansion Port: Automatic Shutdown Module After Printing , Power Off Resume Print Module , Filament break detection and Automatic leveling, BL Touch, WIFI, PWM, ADC, UART, I2C and SPI, etc. 
12)Support file format: g-code 
13) Support machine structure: XYZ, delta, kossel, Ultimaker, corexy 
14)Recommended software: Cura, Simplify3D, pronterface, Repetier-host, Makerware 
15) multiple power supply, sharing the pressure of single power line under current.