BIGTREETECH OCTOPUS User Manual

Produced by BIGTREETECH
Page 12 of 25
Note that if you are using drivers in step/dir mode that use a microstepping factor other than
16 then you cannot use any other drivers in SPI mode since the pins that are required to set
the microstepping to anything other than 16 are also shared with SPI.
Note that if you use an A4988 or a DRV8825 driver, you must connect RST
and SLP.
3.2 UART MODE
When using a driver in UART mode, connect the jumpers beneath that driver as show in the
image below.
3.3 SPI MODE
When using a driver in SPI mode, connect the jumpers beneath that driver as shown in the
image 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