Produced by BIGTREETECH
Page 5 of 25
in place on the board. The connector and passive circuitry are already provided. All
that is required is the amplifier IC.
21. Thermistor input protection. This allows you to short a thermistor input directly to a
voltage source (not that this makes it a good habit to pick up) up to Vin without
causing damage to the motherboard.
22. Allows unused thermistor inputs to be used as general purpose inputs by providing
an input pin for each that bypasses the protection circuit.
23. Supports BL Touch and various other ABL sensors.
24. Supports CAN BUS using a 6P6C RJ11 interface, which offers the board the ability
to interface with future expansion modules.
25. Supports StallGuard for sensorless homing with TMC drivers
26. Provides an SPI expansion port which can connect the SPI-based expansion
modules such as MAX31865 module.
27. Supports the shutdown after printing function.
28. Supports the power loss print resume function
29. Includes inputs for up to 6 endstop switches and 2 filament runout interfaces.
30. Provides an I2C expansion port for peripherals that communicate using that protocol.
1.2 OCTOPUS MOTHERBOARD PARAMETERS
1. Edge to edge size: 160*100mm
2. Mounting hole to hole size: 150*90mm
3. Microprocessor: ARM 32-bit Cortex™-M4 CPU: STM32F446ZET6
4. Recommended input voltage: DC24V
5. Motor drivers: Pluggable drivers supporting all popular driver types.
6. Motor driver sockets: MOTOR0, MOTOR1, MOTOR2_1, MOTOR2_2, MOTOR3,
MOTOR4, MOTOR5, MOTOR6, MOTOR7
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