Produced by BIGTREETECH
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TABLE OF CONTENTS
Table of Contents ...................................................................................................................... 1
Document Change History ........................................................................................................ 2
1 Introduction to BIGTREETECH Octopus V1.0 .................................................................. 3
1.1 Octopus motherboard features ....................................................................................... 3
1.2 Octopus motherboard parameters ................................................................................. 5
2 Motherboard wiring............................................................................................................. 7
2.1 Power wiring .................................................................................................................... 7
2.2 Automatic power down wiring ......................................................................................... 7
2.3 BL Touch wiring .............................................................................................................. 8
2.4 Power loss recovery module wiring ................................................................................ 9
2.5 RGB LED wiring .............................................................................................................. 9
2.6 Raspberry pi wiring ....................................................................................................... 10
3 Stepper driver operational modes.................................................................................... 11
3.1 Step/dir mode ................................................................................................................ 11
3.2 UART Mode .................................................................................................................. 12
3.3 SPI Mode....................................................................................................................... 12
4 Motherboard jumper settings ........................................................................................... 13
4.1 Fan and proximity switch settings ................................................................................ 13
4.2 Stallguard jumper settings ............................................................................................ 14
4.3 MCU power jumper ....................................................................................................... 15
5 Motherboard physical specifications ................................................................................ 16
5.1 Motherboard size .......................................................................................................... 16
5.2 Motherboard connectors ............................................................................................... 16
5.3 Motherboard pins .......................................................................................................... 16
5.4 Special note on expansion interfaces .......................................................................... 17
6 Communicating with the motherboard ............................................................................. 18
7 Motherboard firmware support ......................................................................................... 19
8 Precautions ....................................................................................................................... 20
9 A thank you from bigtreetech ........................................................................................... 22
Appendices .............................................................................................................................. 23
A1. Common driver jumper tables ...................................................................................... 23
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