CB1 User Guide

一. Brief Introduction

The BIGTREETECH CB1 is launched to provide a great solution to the insane shortage of Raspberry Pi CM4. It outputs signals to the motherboard via the fast and convenient two 100 pins micro BTB connection header, including 100M Ethernet, HDMI, etc. Also, onboard 2.4G WiFi.

1.1 Feature Highlights

1. CPU: ALLWINNER H616, Quad-core Cortex-A53 @1.5GHz

2. GPU: Mali G31 MP2, Support OpenGL3.2

3. RAM: 512MB/1GB DDR3L SDRAM

4. Display: Compatible with HDMI2.0A Interface, Support 4K Displays

5. Compatible with USB2.0 Interface

6. Support 100M Ethernet + 100M WiFi

7. Having the same BTB header as the Raspberry Pi CM4.

1.2 Specifications

1. Product Size: 40mm x 55mm

2. Mounting Size: 33mm x 48mm

3. Input Voltage: 5V±5%/2A

4. Output Voltage: 3.3V±2%/100mA

5. Output Voltage: 1.8V±2%/100mA

6. WiFi: 2.4G/802.11 b/g/n

1.3 Dimensions

二. Peripheral Port

2.1 Pin

PIN	Connector	Signal	Description
1	A connector_01	GND
2	A connector_02	GND
3	A connector_03	NC
4	A connector_04	EPHY-TXP	Ethernet TX Positive
5	A connector_05	NC
6	A connector_06	EPHY-TXN	Ethernet TX Negative
7	A connector_07	GND
8	A connector_08	GND
9	A connector_09	NC
10	A connector_10	EPHY-RXP	Ethernet RX Positive
11	A connector_11	NC
12	A connector_12	EPHY-RXN	Ethernet RX Negative
13	A connector_13	GND
14	A connector_14	GND
15	A connector_15	LINK_LED	Ethernet LED
16	A connector_16	NC
17	A connector_17	SPD_LED	Ethernet LED
18	A connector_18	NC
19	A connector_19	NC
20	A connector_20	NC
21	A connector_21	SYS-LED	System work light
22	A connector_22	GND
23	A connector_23	GND
24	A connector_24	PC15	3.3V IO(CB1 V2.1 is 1.8v )
25	A connector_25	PC8	3.3V IO(CB1 V2.1 is 1.8v )
26	A connector_26	PC6	3.3V IO(CB1 V2.1 is 1.8v )
27	A connector_27	PH10	3.3V IO
28	A connector_28	NC
29	A connector_29	NC
30	A connector_30	PG6	3.3V IO
31	A connector_31	PG9	3.3V IO
32	A connector_32	GND
33	A connector_33	GND
34	A connector_34	NC
35	A connector_35	PG7	3.3V IO
36	A connector_36	NC
37	A connector_37	PG8	3.3V IO
38	A connector_38	PH6	3.3V IO
39	A connector_39	NC	3.3V IO
40	A connector_40	PH8	3.3V IO
41	A connector_41	NC
42	A connector_42	GND
43	A connector_43	GND
44	A connector_44	PH7	3.3V IO
45	A connector_45	PC9	3.3V IO(CB1 V2.1 is 1.8v )
46	A connector_46	PC10	3.3V IO(CB1 V2.1 is 1.8v )
47	A connector_47	PC11	3.3V IO(CB1 V2.1 is 1.8v )
48	A connector_48	PC12	3.3V IO(CB1 V2.1 is 1.8v )
49	A connector_49	PC13	3.3V IO(CB1 V2.1 is 1.8v )
50	A connector_50	PC14	3.3V IO(CB1 V2.1 is 1.8v )
51	A connector_51	SoC_RX	DEBUG UART
52	A connector_52	GND
53	A connector_53	GND
54	A connector_54	PC7	3.3V IO(CB1 V2.1 is 1.8v )
55	A connector_55	SoC_TX	DEBUG UART
56	A connector_56	NC
57	A connector_57	SDC0-CLK	SDCARD Clock signal
58	A connector_58	NC
59	A connector_59	GND
60	A connector_60	GND
61	A connector_61	SDC0-D3	SDCARD Data3 signal
62	A connector_62	SDC0-CMD	SDCARD CMD signal
63	A connector_63	SDC0-D0	SDCARD Data0 signal
64	A connector_64	PG11	3.3V IO
65	A connector_65	GND
66	A connector_66	GND
67	A connector_67	SDC0-D1	SDCARD Data1 signal
68	A connector_68	PG12	3.3V IO
69	A connector_69	SDC0-D2	SDCARD Data2 signal
70	A connector_70	PG13	3.3V IO
71	A connector_71	GND
72	A connector_72	PG14	3.3V IO
73	A connector_73	PG16	3.3V IO
74	A connector_74	GND
75	A connector_75	NC
76	A connector_76	SDC0-DET	SDCARD detect
77	A connector_77	VCC_5V	5V IN /2A
78	A connector_78	NC
79	A connector_79	VCC_5V	5V IN /2A
80	A connector_80	NC
81	A connector_81	VCC_5V	5V IN /2A
82	A connector_82	NC
83	A connector_83	VCC_5V	5V IN /2A
84	A connector_84	3V3	3.3V out /200mA
85	A connector_85	VCC_5V	5V IN /2A
86	A connector_86	3V3	3.3V out /200mA
87	A connector_87	VCC_5V	5V IN /2A
88	A connector_88	1V8	1.8V out /100mA
89	A connector_89	NC
90	A connector_90	1V8	1.8V out /100mA
91	A connector_91	NC
92	A connector_92	PWRON	Power switch (useless)
93	A connector_93	FEL	(useless)
94	A connector_94	NC
95	A connector_95	NC
96	A connector_96	NC
97	A connector_97	NC
98	A connector_98	GND
99	A connector_99	RECOVERY	Program download (useless)
100	A connector_100	AP-RESET	power reset (useless)
101	B connector_1	NC
102	B connector_2	NC
103	B connector_3	USB1-DM	HOST USB1
104	B connector_4	LINEOUTL
105	B connector_5	USB1-DP	HOST USB1
106	B connector_6	LINEOUTR
107	B connector_7	GND
108	B connector_8	GND
109	B connector_9	NC
110	B connector_10	NC
111	B connector_11	TV_OUT	CVBS OUT
112	B connector_12	NC
113	B connector_13	GND
114	B connector_14	GND
115	B connector_15	NC
116	B connector_16	NC
117	B connector_17	NC
118	B connector_18	NC
119	B connector_19	GND
120	B connector_20	GND
121	B connector_21	NC
122	B connector_22	NC
123	B connector_23	NC
124	B connector_24	NC
125	B connector_25	GND
126	B connector_26	GND
127	B connector_27	NC
128	B connector_28	USB3-DM	HOST USB3
129	B connector_29	NC
130	B connector_30	USB3-DP	HOST USB3
131	B connector_31	GND
132	B connector_32	GND
133	B connector_33	NC
134	B connector_34	USB2-DM	HOST USB2
135	B connector_35	NC
136	B connector_36	USB2-DP	HOST USB2
137	B connector_37	GND
138	B connector_38	GND
139	B connector_39	NC
140	B connector_40	USB0-DM	OTG USB
141	B connector_41	NC
142	B connector_42	USB0-DP	OTG USB
143	B connector_43	NC
144	B connector_44	GND
145	B connector_45	NC
146	B connector_46	NC
147	B connector_47	NC
148	B connector_48	NC
149	B connector_49	NC
150	B connector_50	GND
151	B connector_51	HCEC	HDMI CEC
152	B connector_52	NC
153	B connector_53	HHPD	HDMI Hotplug
154	B connector_54	NC
155	B connector_55	GND
156	B connector_56	GND
157	B connector_57	NC
158	B connector_58	NC
159	B connector_59	NC
160	B connector_60	NC
161	B connector_61	GND
162	B connector_62	GND
163	B connector_63	NC
164	B connector_64	NC
165	B connector_65	NC
166	B connector_66	NC
167	B connector_67	GND
168	B connector_68	GND
169	B connector_69	NC
170	B connector_70	HTX2P	HDMI TX2 Positive.
171	B connector_71	NC
172	B connector_72	HTX2N	HDMI TX2 Negative.
173	B connector_73	GND
174	B connector_74	GND
175	B connector_75	NC
176	B connector_76	HTX1P	HDMI TX1 Positive.
177	B connector_77	NC
178	B connector_78	HTX1N	HDMI TX1 Negative.
179	B connector_79	GND
180	B connector_80	GND
181	B connector_81	NC
182	B connector_82	HTX0P	HDMI TX0 Positive.
183	B connector_83	NC
184	B connector_84	HTX0N	HDMI TX0 Negative.
185	B connector_85	GND
186	B connector_86	GND
187	B connector_87	NC
188	B connector_88	HTXCP	HDMI CLK Positive.
189	B connector_89	NC
190	B connector_90	HTXCN	HDMI CLK Negative.
191	B connector_91	GND
192	B connector_92	GND
193	B connector_93	NC
194	B connector_94	NC
195	B connector_95	NC
196	B connector_96	NC
197	B connector_97	GND
198	B connector_98	GND
199	B connector_99	HSDA	HDMI I2C
200	B connector_100	HSCL	HDMI I2C

三. Interface Introduction

Install via the BTB Connection

3.2 40 Pins GPIO

When Manta series motherboard work with CB1, 40 pins GPIO is a custom IO arrangement, as shown in the figure below, Pin 7 is CB1's "PC7", and Pin 11 is CB1's "PC14". The GPIO number of CB1 corresponds to (Px–PA)*32 + Pin
For example:
PC7 = (PC–PA)*32 + 7 = 2 * 32 + 7 = 71
PH10 = (PH–PA)*32 + 10 = 7 * 32 + 10 = 234
PC7 is numbered in Klipper as pin: host: gpio71, PH10 as pin: host: gpio234

Note: The logic voltage of PC ports in V2.1 version (PC6, PC7, PC8, PC9, PC10, PC11, PC12, PC13, PC14, PC15): 1.8V;

The logic voltage of PC ports in V2.2 version (PC6, PC7, PC8, PC9, PC10, PC11, PC12, PC13, PC14, PC15): 3.3V.

四. Write OS

4.1 Download the OS Image

Please download and install the OS image we provided: https://github.com/bigtreetech/CB1/releases

4.2 Download and Install Writing Software
The official Raspberry Pi Imager: https://www.raspberrypi.com/software/
balenaEtcher: https://www.balena.io/etcher/
Both of the above software can be used, just choose one to download and install.

4.3 Write OS

4.3.1. For Raspberry Pi Imager

1. Insert a MicroSD into your computer.

2. Choose OS.

3. Select "Use custom", then select the image that you downloaded.

4. Select the MicroSD card and click "WRITE" (WRITE the image will format the MicroSD card. Be careful not to select the wrong storage device, otherwise the data will be formatted.)

5. Wait for the writing to finish

4.3.2. For balenaEtcher

1. Insert a MicroSD card to your computer through a card reader.

2. Select the image that you downloaded.

3. Select the MicroSD card and click "WRITE" (WRITE the image will format the MicroSD card. Be careful not to select the wrong storage device, otherwise the data will be formatted.)

4. Wait for the writing to finish.

五. Configure Network

5.1 Ethernet Cable

Plug-and-play with an Ethernet cable, no additional setup required.

5.2 WiFi Setting

After successfully writing the OS image, the MicroSD card will have a FAT32 partition recognized by the computer and a configuration file named "system.cfg" under this partition.

Open with Notepad, replace WIFI-SSID with your WiFi name, and PASSWORD with your password.

六. Configure Motherboard

6.1 SSH Connect to Device with CB1 Installed

1. Install the SSH application Mobaxterm: https://mobaxterm.mobatek.net/download-home-edition.html
2. Insert the MicroSD card to the motherboard, and wait for the system to load after power on, approx. 1-2 minutes.
3. The device with CB1 installed will automatically be assigned an IP after being successfully connected to the network.
4. Find the IP address on your router page.

5. Open Mobaxterm and click "Session", and click "SSH", enter the IP you got in step 3 into Remote host, and click "OK". (Note: your computer and the printer needs to be in the same network.)

6. Login as: biqu, password: biqu.

6.2 Compile MCU Firmware

1. After SSH is successfully connected to the device with CB1 installed, enter in the terminal:

cd ~/klipper/
make menuconfig

Compile the firmware with the corresponding motherboard configuration, here is the Manta M4P example:

* [*] Enable extra low-level configuration options
* Micro-controller Architecture (STMicroelectronics STM32) --->
* Processor model (STM32G0B1) --->
* Bootloader offset (8KiB bootloader) --->
* Clock Reference (8 MHz crystal) --->
* Communication interface (USB (on PA11/PA12)) --->

2. Press q to exit, and Yes when asked to save the configuration.

3. Run make to compile firmware, "klipper.bin" file will be generated in home/pi/klipper/out folder when make is finished, download it onto your computer using the SSH application.

七. Cautions

· All unplugging and plugging operations should be performed under the condition of power off, except for HDMI, USB, and RJ45.

· Pay attention to the heat dissipation of CB1. If the running application consumes too many system resources, the CB1 will get hot quite seriously.

If you need other resources for this product, please visit https://github.com/bigtreetech/ and find them yourself. If you cannot find the resources you need, you can contact our after-sales support.

If you encounter other problems during use, feel free to contact us, and we are answering them carefully; any good opinions or suggestions on our products are welcome, too and we will consider them carefully.

To：

Dear Customers, There may be a lag of several hours before we could process your order, depending on the time difference between your location and ours. Sincerely hoping your understanding!

Email(support)

services01@spotpear.com

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