Content

1. Specifications
2. Connections
3. Resources

Specifications

Key Features

• Form Factor: Compact 85 × 56 mm footprint; low-profile design with only 7 mm height without CM5 and heatsink
• GPIO: Standard 40-pin Raspberry Pi-compatible GPIO pins
• Mounting: Mounting holes follow the Raspberry Pi standard

Interfaces & Connectivity

• USB:
  • 1x USB for power / flash mode / device mode
  • 1× USB 3.0 Host (USB-C)
  • 1× internal USB 2.0 headers (PH2.0)
• Video Output / Camera Input :
  • 1x HDMI output via HDMI/LAN daughterboard
  • 1× MIPI CSI / DSI FPC connectors (22-pin, 0.5 mm pitch)
• PCIe:
  • PCIe connector
• Power Supply:
  • USB-C input (+5 V)
• Additional Connections:
  • 4-pin fan connector
  • Power button
  • Flash mode button
  • microSD slot for CM5 Lite modules (without eMMC)

Connections

1. Raspberry Pi GPIO 40-pin

Uses standard pin out of the Raspberry Pi

2. USB 3.0 Connector

USB Host (Type C) connector to connect usually USB devices like keyboards, mouse, USB-LAN-adapter etc

3. MicroSD Card Slot

The MicroSD card slot on the BentoIO CMX0 expansion board provides easy access to removable storage for system images and data.

4. Boot Button

The BOOT button on the CMX0 switches the module into eMMC write mode: hold the button while powering the board via USB, release it after about 2 seconds, and the eMMC can then be programmed. More information: https://github.com/raspberrypi/usbboot

5. OTG ID Solder Bridge

When this solder bridge is closed, OTG mode is enabled, allowing the USB-C Power/Device (USB-PD) port to operate in device mode (OTG). In this mode, the board can present itself as a USB device—such as a mass storage device—via the USB-C port. Additional software configuration is required to use this functionality.

6. USB-C Power

This USB-C port supplies power to the CMX0. It is recommended to use the original Raspberry Pi 27 W power supply. The port can also operate in USB OTG mode and supports USB 2.0 functionality.

7. Power Button

Turns the system on. A short press powers on the system, while pressing and holding the button for approximately 5 seconds triggers a hard reset. If supported by the operating system, the button can also be used for a graceful shutdown via software.

8. Status LEDs

The two status LEDs indicate read and write activity

9. PCIe

This 16-pin FPC connector allows a flat flex cable to be attached in order to connect standard Raspberry Pi–compatible PCIe expansion boards. The contact side of the cable must face upward.

10. HDMI

This FPC connector provides HDMI video output and is compatible with the BentoIO HDMI/LAN adapter. It uses a 20-pin connector with 0.5 mm pitch. Due to the high-speed nature of the HDMI signal, a dedicated high-speed FPC cable is required, typically identifiable by its black color. This cable is included with the BentoIO HDMI/LAN adapter, making the adapter an optimal accessory. The contact side of the cable must face upward.

11. CSI / DSI

A DSI display or CSI camera can be connected here. The DSI-1 / CSI-1 channel is provided via a 22-pin connector with 0.5 mm pitch. The contact side of the cable must face upward.

12. Power Output

This connector provides a 5 V power supply with a maximum current of 1 A and uses a 2.54 mm pitch.

13. Battery (RTC)

A standard Raspberry Pi–compatible 4-pin fan with a JST-SH 1.0 mm connector can be connected.

14. USB 2.0

This connector provides one USB 2.0 ports using JST-PH 2.0 connectors. The ports supply a maximum current of 2.0 A respectively. The exact pinout and power rating are labeled directly on the connector.

Resources