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1. PCB Installation View

The product PCB measures 265×120 mm, with the top view shown below:

2. Module Installation

2.1 Pre-Installation Notes

2.2 Install Rpi-CM5

Installation: Align the Rpi-CM5 module with the installation slot and place it flat. Gently press the module with your hand to ensure it sits properly in place. Avoid applying excessive force or forcing it down, as this may damage the connector or module. For permanent use, secure all four screw holes with M2.5 screws to prevent detachment during operation.

Disassembly: Remove the four fixing screws. Using a plastic pry tool, gently pry one edge not in contact with the connector (preferably the right side as shown in the view, i.e., the position of the fan connector), then lift it slightly upward until the module detaches from the slot; remove the module.

2.3 Install the WAN Module

This product supports standard WWAN modules measuring 30×51mm or 30×42mm, featuring an M.2 B-Key interface with 67 pins and USB 3.0 communication.

The motherboard typically comes pre-installed with 30×51 modules. If users require 30×42mm modules, a 3.0mm-high M3 single-head fastening stud must be added to the board.

The user inserts the module at an angle into the M.2 slot. Once in position, gently press the module against the fixed hole for alignment, then secure it with M2.5 screws (M3 for 30×42 models).

2.4 Install the Antenna

This product features two sets of antennas—one internal and one external. The internal interface uses IPEX-G1, while the external interface employs SMA (internal hole). Users can install the appropriate antenna based on their specific requirements.

2.5 Install the SIM Card

The SIM card is primarily designed to work with a WAN module for mobile communication. The SIM card slot is located at edge J15 on the board. This product only supports Nano-SIM cards.

Insertion: Insert the SIM card chip with its edge facing downward and the notch facing inward into the J15 slot, then gently push it inward until you hear the locking sound.

Removal: Gently push inward with your hand until the unlock sound is heard; the SIM card then pops out and can be removed.

2.6 Install the Real-Time Clock Button Battery

This product provides a 2032 button battery connector (J4) to maintain the real-time clock operation of the Rpi-CM5.

Installation: Purchase a 2032 button battery of the appropriate model. Insert the battery according to the spring orientation, push it toward the locking position, and gently press downward until the battery engages with the locking mechanism.

Removal: Gently press the battery with your hand, then use pliers to pull the retaining tab backward until the battery pops out of the socket; remove it.

3. Power Supply and On/Off Operation

3.1 Power Supply Method

The product supports three power supply methods:

3.2 Power-On of the System

Before powering on, users should correctly insert all modules, ensure the PCB is installed inside the fixed chassis or placed in a secure position, and verify that no cables or components that may cause short circuits are present nearby.

Connect a DC power source or a USB Type-C power source.

3.3 Power Off System

The user unplugs the external power source, including a DC power supply or a USB Type-C power adapter.

4. Power On and Off

4.1 Power On

After powering on the system, it will start automatically.

When the system is powered on but in the shutdown state, press SW1 once to power it up.

After turning on the device, you should normally see the D3 light illuminate.

4.2 Power Off

The system is operating normally. Users should first perform a shutdown operation in the system (e.g., the poweroff command), after which the system will shut down automatically.

Users can press the SW1 switch button once; the system will then display shutdown options, allowing them to choose to shut down.

Under special circumstances, users can perform a forced shutdown by pressing the SW1 switch button for 3 to 5 seconds.

After shutting down, the user can unplug the power supply.

5. Burn the Firmware

When your Rpi-CM5 is a brand-new motherboard with no pre-installed system on its internal storage, you must first flash the firmware.

1. Preparations before burning
   This system uses a Windows host; users should first download the required software and prepare a data cable.
   Download and install: rpiboot
   Download and install: Raspberry Pi Imager
   Data cable: A USB Type-A to USB Type-C data cable.
2. Jumper wire
   When the power is off, set the jumper at position J3 to a short-circuit state by fitting the jumper cap.
3. Insert a DC power supply
   Since the USB Type-C bus handles both power supply and data communication, the computer's output power is limited and may not be sufficient to power the Rpi-CM5. Therefore, a DC power supply is recommended.
4. Connect the USB cable
   Insert the Type-C data cable's Type-C port into the product's J2 USB Type-C connector, and connect its Type-A port to the computer. After insertion, a new device named "BCM2712D0 Boot" appears in Device Manager under General Serial Bus Devices.
5. Create a high-capacity USB storage device
   Run the "rpiboot – Mass Storage Gadget" from the rpiboot installation directory to initialize the previously identified USB device as a high-capacity storage device.
6. Burn the firmware
   Run Raspberry Pi Imager, follow the prompts to enter the required information, and flash the firmware. Users can first download the corresponding firmware from their local image repository and then proceed with local firmware import for flashing. Refer to the Raspberry Pi documentation for the specific programming and flashing method.
7. Return to normal operating mode
   After completing the burning, power off and set the jumper at position J3 to open circuit, or remove the jumper cap. After power restoration, the system will officially operate from the CM5 storage device.

6. Relevant System Configuration

6.1 Features That Do Not Require Configuration by Default

In this system, the following functions do not require configuration:

• Switching Function: By default, the switching chip operates normally once properly powered.
• HDMI Functionality: Once the system is operating normally, the HDMI function works properly without requiring any additional configuration.
• USB-HUB Functionality: Once the system is operational, it automatically detects the USB-HUB feature, enabling all four sets of USB Type-A ports to function properly.

The features to configure include:

• LAN Port Functionality: The Rpi-CM5 cannot automatically recognize the YT6801 chip in this product and requires driver installation.
• RS232 Port Functionality: The Rpi-CM5 does not default enable the corresponding UART function; kernel DTS configuration is required.
• Required GPIOs: The system necessitates modifying the kernel DTS or performing corresponding configurations.

6.2 Pre-Configuration Preparation

After properly powering on the device, first configure its WiFi function to establish network connectivity—ideally enabling internet access.

6.3 Install the LAN Port Driver

This product's LAN port (J7) employs the YT6801 chip and connects via the PCIe 2.0 interface of the Rpi-CM5 board.

Upon entering the system, using the lspci command reveals the device: "0001:01:00.0 Ethernet Controller: Motorcomm Microelectronics YT6801 Gigabit Ethernet Controller (Rev 01)." This indicates that the YT6801 is connected via a PCIe interface and requires only driver installation.

The installation and deployment steps are as follows:

1. Copy the driver (yt6801-1.0.31.tar.gz) to the product directory.
2. Decompress the driver: tar xvf yt6801-1.0.31.tar.gz
3. Enter the driver directory: cd yt6801-1.0.31
4. Install the driver: sudo ./install_yt6801-driver
5. Check for error prompts until installation is complete.

Writing the MAC address: If you need to write the MAC address to the network card, follow these steps:

1. Enter the yt6801-1.0.31 directory from the previous decompression step.
2. Check that the Motorcomm_NIC_Burn_Helper program was generated during the previous installation step.
3. Execute: sudo ./Motorcomm_NIC_Burn_Helper -index 0 -mac "MAC-ADDR"

6.4 Configure DTS Functionality

Modify the /boot/firmware/config.txt file and add a line in Section [CM5]:

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