SKR V1.4 / Turbo https://github.com/bigtreetech/BIGTREETECH-SKR-V1.3/tree/master/BTT%20SKR%20V1.4
※ ※ SKR motherboard parameters】 ：
Size of appearance: 110 * 85mm
Mounting size: 102 * 76mm
Microprocessor: ARM Cortex-M3 CPU
Input voltage: DC12V-DC24V 5A-15A
Logic voltage: DC 3.3V
WIFI module: ESP-01S
Motor driver: support TMC5161, TMC5160, TMC2209, TMC2225, TMC2208, TMC2130, ST820, LV8729, DRV8825, A4988 etc., independent external motor drive.
Support of driver working mode: SPI, UART, STEP / DIR
Motor driver interface ： X 、 Y 、 Z 、 E0 、 E1，5-way （Each interface has a closed control interface) with up to 256 subdivisions
Temperature sensor interface: TH0, TH1, TB, 3-channel 100K NTC temperature
※ 1.SKR motherboard features: ：
1） Pluggable external DC5V power supply module for power supply of TFT screen, BL touch and RGB.
2） Equipped with highly modular and open source firmware Marlin2.0 which is suitable for home improvement and secondary developer users;
3） Other fan interfaces: 1-way CNC fan, 3-way normally open fan;
4） Support 2.4, 2.8, 3.5 inch color touch screen, support LCD2004 screen, LCD12864 screen
5） Update and configure firmware via SD card, which is easy, convenient and efficient.
6） The thermistor interface is protected by an overpressure resistor with a bile capacitor in order to increase the resistance of the interface. ；
7） Supports resuming printing when switching off, detecting thread breaks, automatic shutdown after printing, etc. usw.
8） high performance mosfet tube, better heat dissipation;
9） The closed-loop drive interface is reserved to reduce the problems of the plug-in switching module. ；
10） Reserved extended port SERVOS and probe to support BL Touch;
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√ 1. 【Main Control Chip】 Performance has been significantly improved with the LPC1768 series Cortex-M3 main control chip with 32-bit main frequency and 120 MHz ARM level
√2. 【Power:】 Using dedicated M6130 power chip, support 12-24V power input;
√3. 【Work mode】 The SPI and UART work mode controlled by the TMC driver, which also has the DIAG pin, which eliminates the need for a complex wiring process and can be used by simply pulling the jumper cap off.
√4. 【Double Z-axis ：】 Double Z-axis interface, which eliminates problems with the external drive expansion module;