Dual Gigabit 5G 4G Ethernet Base Board for RPi Compute Module CM4
Download CM4 ETH Base Board User Guide
This Ethernet Board has been designed for Raspberry Pi Compute Module CM4. The 5G and 4G cellular support make this ETH Base Board ideal for integration into end products. The board features a dual Gigabit Ethernet RJ45 and M.2 B KEY interface to connect with the 4G / 5G module. The board has a Nano SIM card slot. In addition, the board has 2x USB 3.2 GEN1 ports and a 40-PIN Raspberry Pi GPIO Header.


Video Presentation of the Product
Specifications of 5G / 4G Dual Gigabit Ethernet Base Board
- Compute Module Socket: CM4 compatible socket (works with all Compute Module 4 variants)
- Networking: Rj45 Dual Gigabit Ethernet 10M / 100M / 100M | M.2 B KEY | Nano SIM Card Slot
- USB Interfaces: 2x USB 3.2 GEN1 Ports
- Extension Header: 40-PIN Raspberry Pi GPIO Header
- Display Interface: MIPI DSI Port (FPC connector 1.0mm 15 Pin)
- Camera Interface: 2x MIPI CSI-2 Ports (FPC connector 1.0mm 15 Pin)
- Video Support: 2x HDMI Ports | Supports 4K video output @ 30fps
- Storage: Micro SD Card Slot (for CM4 Lite)
- RTC: Real-Time Clock with Battery Socket | Compatible with CR2032 Button Cell (Not Included) | Can wake CM4
- Fan Header: 5V ~ 12V Fan Header | supports speed measurement and adjustment | Set to 12V by default
- Power Input: Compatible with 5V / 2.5A Power Supply
- Weight: 76 Grams
- Dimensions: 99.6mm x 87.0mm | 9.96cm x 8.7cm
Application Examples
Compatible with Cellular Modules that Support M.2 B KEY
You need an additional communication module to enable 4G / 5G cellular network function.
Connection with Compute Module 4

Hardware Layout
- CM4 Socket (Compatible with all Compute Module 4 Variants)
- GPIO Header 40-PIN
- Dual RJ45 Gigabit Ethernet | ETHERNET 0: CM4 original ETH | ETHERNET 1: USB extended ETH
- HDMI Ports x2
- USB 3.2 GEN1 Ports x2
- USB & PWR for USB Programming and DC Power Supply
- Fan Header
- CAM MIPI CSI x2 Ports
- Module Status Indicator for 4G / 5G Module | STA red: module enable indicator | NET green: module operating status indicator
- CM4 Status Indicator | PWR red: Raspberry Pi power indicator | ACT green: Raspberry Pi operating status indicator
- BOOT Selection | ON: CM4 will be booted from USB-C interface | OFF: CM4 will be booted from eMMC or Micro SD card
- DISP MIPI DSI Port
- 2 B KEY
- Nano SIM Card Slot
- Micro SD Card Slot (Supports Micro SD card with pre-burnt image – CM4 Lite variant only)
- RTC Battery Holder
- RTC Interruption Configuration | GL-EN: CM4 power down on RTC interruption | PI-RUN: CM4 will reboot on RTC interruption | D4: D4 pin is triggered on RTC interruption (default)
- IO-VREF Selection (Set the IO Logic Level for CM4 to 3.3V default or 1.8V
- Power supply selection FAN | 12V by default or 5V
- I2C Bus selection RTC / FAN | GPIO3/2: I2C-1 is shared with 40PIN header | SDA0/SCL0: I2C-10 is shared with CSI/DSI (default)
- Function Configuration (System) | WiFi_DIS: WiFi disabled, for CM4 with antenna variant ONLY | BT_DIS: Bluetooth disabled, for CM4 with antenna variant ONLY | WP_DIS: boot mode switch, ONLY be used when NOT booted from eMMC or SD card
- USB Gigabit Ethernet Chip RTL8153
Outline Dimensions
Items Included
- Dual Gigabit ETH Base Board x1
Compute Module and SIM Module are NOT included.