Brief Introduction
BIGTREETECH CB1 is an alternative to Raspberry Pi CM4, which is currently out of stock. BIGTREETECH M4P is a 4-axis motherboard using a CM4 BTB header, which can work with CB1 or CM4 perfectly.
Main Features
- DSI1, CSI1 interface (for CM4).
- Gigabit Ethernet interface (1000M for CM4, 100M for CB1).
- 3 USB 2.0 ports.
- Equipping the ESD protection chip on the USB and Ethernet ports to prevent being broken down by the static electricity.
- When working with Raspberry Pi CM4, its 40pin pin header has the same function as that of Raspberry Pi(Custom IO for CB1).
- Using a BTB board-to-board connection, which can be further reinforced with screws, perfectly compatible with CB1 or Raspberry Pi CM4.
- The MCU adopts STM32G0B0RE 32-bit ARM Cortex-M0+ @64MHz chip.
- The power chip adopts TPS5450-5A, which supports DC12/24V power input, the output current of the chip is up to 5A, and the peak value can reach 6A, which perfectly supports the power supply of the core board.
- The protection circuit of the thermistor part prevents the main control chip from burning due to leakage of the heated bed or heater cartridge.
- In CNC fan ports: FAN0, FAN1, and FAN2, a 24V (DCIN) or 5V power supply can be selected with a jumper cap (Note: the voltage of the three CNC fans should be the same, and cannot be set to different voltages individually).
- MCU firmware can be upgraded through SD card, or through DFU with Klipper’s make flash command.
- On-board TMC-driven SPI and UART working modes, on-board DIAG function pins, can be used by simply plugging and unplugging the jumper cap.
- Support filament runout detection, BLTouch, RGB lights.
- Adopt replaceable fuse for easy replacement.
Basic Parameters
- Product Size: 160 x 95mm.
- Installation Size: 146 x 84.2mm; 97 x 84.2mm.
- Core Board Installation Size: 33 x 48mm.
- The maximum output current of the heated bed port: 10A.
- The maximum output current of the heater cartridge port: 6A.
- Fan Port: Three for CNC Fan(24V/5V Voltage Selectable), One SoC Fan(Voltage not Selectable).
- The maximum output current of the fan port:1A.
- Total current for heater cartridge + driver + fan: <20A.
- Extended Interface: BLTouch(Servos, Probe), Fil-DET, 2 * RGB.
- Motor Driver: Support TMC5160, TMC2209, TMC2225, TMC2226, TMC2208, TMC2130, ST820, LV8729, DRV8825, A4988…
- Driver Working Mode Support: SPI, UART, STEP/DIR.
- Motor Drive Interface: X, Y, Z(Dual Z-axis), E0, a total of four.
- Temperature Sensor Interface: 2-way 100K NTC.
- Display Screen: RepRapDiscount EXP-1 + EXP-2.
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