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SKR Motherboard Parameters: Appearance size: 110*85mm Mounting size: 102*76mm Microprocessor: ARM cortex-M3 CPU Input voltage: DC12V-DC24V 5A-15A Motor driver: support TMC2208, TMC2130, ST820, LV8729, DRV8825, A4988, can be independently external motor drive Driver working mode support: TMC2130SPI, TMC2208UART Motor drive interface: X, Y, Z, E0, E1, five (each has a reextendable interface), Up to 256 subdivisions Display: 2.8 "TFT, 3.5" TFT, LCD2004, LCD12864 How to Use The SKR 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. Without the driver installed, it is easy for the computer to not recognize the USB port 1. Smoothieware-usb-driver-v1.1 driver installation (Windows systems only) The driver can be obtained from our open-source network Https://www.dropbox.com/s/ighnj7oa2l0bm5g/smoothieware-usb-driver-v1.1.exe?dl= 0 2. After installing the driver, connect the computer and SKR motherboard with USB cable Note: When using smoothieware open-source firmware, since only Windows system drivers, the SKR board at this time can only be recognized by the Windows system port! ! ! 3. If you are using Marlin2.0 firmware, follow the tutorial to install: Tutorial:https://www.dropbox.com/s/ppjfflhf3j5yzh2/MarlinV2.0%20SKRV1.1%20instruction.docx?dl=0 Driver:https://www.dropbox.com/s/a0k5idjmf4fn82f/lpc176x_usb_driver.inf?dl=0 If you need more information about this Board please contact us Package Included 1pc SKR V1.3 Board 1pc USB cable