BIGTREETECH OCTOPUS User Manual

Produced by BIGTREETECH
Page 20 of 25
8 PRECAUTIONS
The precautions listed in this section should not be overlooked. They have been included
as reminders to prevent damage to your motherboard.
1. Never work on the motherboard with power applied.
2. Always double check all jumpers and wiring before applying power. Improper
jumpers or wiring can cause damage to the motherboard and possibly even
peripherals that it interfaces with.
3. The motherboard can power heated beds up to 300W. If you are using a bed that
operates at a higher power then you will need to use an external MOSFET.
4. Always consult the PIN.pdf diagram when making jumper connections or wiring
changes. Assuming a connection order may result in damage to the motherboard.
5. It is recommended to update the firmware using SD card. Using DFU (direct
programming via the USB port) will overwrite the bootloader meaning that you will no
longer have the option to update via SD card.
6. The stock Octopus does not come with a INA826AIDR amplifier chip. If you want to
use the PT100 interface, you need to purchase a INA826AIDR chip (SOP-8 Package)
separately and solder the chip into the correct position as shown below.

BIGTREETECH OCTOPUS Specifications

General

Flash Memory	512 KB
RAM	128 KB
Input Voltage	12V-24V DC
Operating Voltage	3.3V
Clock Speed	180 MHz
PC Communication Interface	USB
Supported File Format	G-code
Ethernet	No
Wi-Fi	No
Bluetooth	No
Processor	ARM Cortex-M4 STM32F446ZET6
Stepper Driver Support	Up to 8 stepper drivers
Connectivity	USB, UART, SPI, I2C
Expansion Interface	UART, SPI, I2C
Temperature Sensor Interface	Supports thermistors
Digital I/O Pins	Available, quantity varies depending on configuration
Analog Input Pins	Available, quantity varies depending on configuration