Cm4 board

Cm4 board DEFAULT

Carrier boards for Raspberry Pi CM4 modules are all over the place for routers, NAS, industrial gateways, and more. Here’s another one with the Minimal Carrier Board for Raspberry Pi Compute Module 4, or MinCab, that powers the RPi CM4 module via a USB Type-C port.

Minimal Carrier Board for Raspberry Pi Compute Module 4

That’s about all it does, although you would also be able to access some GPIOs, 5V,  3.3V, and GND signals via pads on the carrier board. Specifically, eight GPIOs are accessible with IO14, IO15, IO2, IO3, IO4, IO12, IO13, and IO18. Ivan Kuleshov explains this can be useful for Smart Home systems for instance, but it could be anything that requires WiFI and/or Bluetooth connectivity, a powerful Linux capable processor (as opposed to something like ESP32), and a few I/Os.

MinCab Rapsberry Pi CM4

The MinCab might be a good alternative to the upcoming (and delayed) Raspberry Pi 4 Model A for people wanting to use Broadcom BCM2711 processor in a more compact form factor, although to be honest the space-saving against a carrier board like Piunora is not that much, as you’ve got some ports at the cost of the system being thicker.

Uptime Lab does not have any information about the carrier board on its website at this time.  It’s similar in concept, although admittedly much smaller (when the CM4 is not connected), to the open-source hardware Less-is-More (LiM) carrier board that also offers a USB-C port for power and two LED’s, as well as a MicroSD card slot for the latest version.

Less-is-more (LiM) carrier board
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Jean-Luc Aufranc (CNXSoft)

Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.

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Mini Base Board for Compute Module 4

suitable for evaluating the Raspberry Pi CM4 or being integrated into end products

Powerful functions in a credit card sized body


CM4 socketsuitable for all variants of Compute Module 4
NetworkingGigabit Ethernet RJ45 connector
M.2 M KEY, supports communication modules or NVME SSD
ConnectorRaspberry Pi 40PIN GPIO header
USBUSB 2.0 Type A × 2, USB 2.0 via FFC connector × 2
DisplayMIPI DSI display port (15pin 1.0mm FPC connector)
CameraMIPI CSI-2 camera port × 2 (15pin 1.0mm FPC connector)
VideoHDMI port × 2 (including one port via FFC connector), supports 4K 30fps output
RTCReal-time clock with battery socket and ability to wake Compute Module 4
StorageMicroSD card socket for Compute Module 4 Lite (without eMMC) variants
Fan headerallows speed adjustment and measurement, 5V
Power input5V
Dimensions85 × 56mm

Connecting with Compute Module 4

standard CM4 socket and color-coded Raspberry Pi 40PIN GPIO header
suitable for Compute Module 4 Lite/eMMC series module

Compact, yet Complete

onboard multiple connectors including:
CSI/DSI/RTC/FAN/HDMI/USB/RJ45 Gigabit Ethernet/Micro SD Card Slot/M.2 Slot

What's On Board

  1. CM4 socket
    suitable for all variants of Compute Module 4
  2. Power input/Programming
    5V/2.5A power supply, or used for eMMC burning
  3. DISP
    MIPI DSI display port
  4. FAN
    for connecting cooling fan, allows speed adjustment and measurement
  5. CAM
    2x MIPI CSI camera ports
  6. HDMI0 connector
    HDMI0 port, supports 4K 30fps output
  7. USB 2.0 ports
    2x USB 2.0 ports, for connecting sorts of USB devices
  8. Gigabit Ethernet connector
    Gigabit Ethernet RJ45 connector, with 10 / 100 / 1000M network support
  9. M.2 indicator
    indicating the operating status of M.2 interface
  10. ACT indicator
    indicating the operating status of Raspberry Pi
  11. PWR indicator
    indicating the status of Raspberry Pi power supply
  12. BOOT selection
    ON: CM4 would be booted from USB-C interface
    OFF: CM4 would be booted from eMMC or Micro SD card
  1. 40PIN GPIO header
  2. Micro SD card slot
    for connecting a Micro SD card with pre-burnt image (Lite variant ONLY)
  3. HDMI1 FFC connector
    HDMI1 port, supports 4K 30fps output
  4. USB 2.0 FFC connector
    can be connected through an adapter
  5. FE1.1S
    USB HUB chip, expanding one USB port to 4x ports
  6. M.2 slot
    supports sorts of NVME SSD, or communication modules with PCIE M.2 KEY-M interface
  7. RTC chip
    allows RTC-related functions like wakeup, shutdown, reboot, and more
  8. RTC interrupt selection
    PI-RUN: CM4 reboot on RTC interruption
    GN-EN: CM4 shutdown on RTC interruption
    D4: D4 pin is triggered on RTC interruption
  9. EMC2301
    fan controller, for speed adjustment / measurement
  10. RTC battery holder
    supports CR1220 button cell

Outline dimensions

Application example

working with displays and cameras

working with an additional SSD

for reference only, CM4, displays, cameras, and SSD are NOT included.

Resources & Services

* Resources for different product may vary, please check the wiki page to confirm the actually provided resources.

  1. Pool towel dryer
  2. Huntington beach acura
  3. Kiteboarding lessons california

Compute Module 4 IO Board

Exposing every interface from Raspberry Pi Compute Module 4, the Compute Module 4 IO Board provides a development platform and reference base-board design for our most powerful Compute Module yet.

Buy now

Introducing the Raspberry Pi Compute Module 4 and IO Board


  • External power connector (+12V, +5V)
  • 2 x full-size HDMI 2.0 connectors
  • 2 x USB 2.0 connectors, with header for two additional connectors
  • Gigabit Ethernet RJ45 with PoE support
  • Micro USB socket for updating Compute Module 4
  • MicroSD card socket for Compute Module 4 Lite (without eMMC) variants
  • PCIe Gen 2 x1 socket
  • Standard fan connector
  • 2 x MIPI DSI display FPC connectors (22-pin 0.5 mm pitch cable)
  • 2 x MIPI CSI-2 camera FPC connectors (22-pin 0.5 mm pitch cable)
  • Standard Raspberry Pi HAT connectors
  • Real-time clock with battery socket and ability to wake Compute Module 4
  • Various jumpers to disable specific features, e.g. wireless connectivity, EEPROM writing


The Raspberry Pi Compute Module 4 IO Board has undergone extensive compliance testing and meets the standards required in many countries. You can find all compliance information and regional certificates at

If you are integrating the Compute Module 4 IO Board into a product and need assistance with compliance, the Raspberry Pi Integrator Programme can help: more information and contact details here.

The Adopted Trademarks HDMI, HDMI High-Definition Multimedia Interface, and the HDMI Logo are trademarks or registered trademarks of HDMI Licensing Administrator, Inc. in the United States and other countries.

Obsolescence Statement

Compute Module 4 IO Board will remain in production until at least January 2028

FINALLY! Native M.2 NVMe on a Raspberry Pi - CM4 TOFU

Waveshare Raspberry Pi Compute Module 4 IO Board a Development Platform and Reference Base-Board Design for CM4 Without WiFi

Raspberry Pi Compute Module 4 IO Board, A Development Platform

The Compute Module 4 IO Board is a companion board for Raspberry Pi Compute Module 4 (supplied separately). It is designed for use both as a development system for Compute Module 4 and as an embedded board integrated into end products.

The IO board is designed to allow you to create systems quickly using off-theshelf parts such as HATs and PCIe cards, which might include NVMe, SATA, networking, or USB. The major user connectors are located along one side to make enclosures simple.

Compute Module 4 IO Board also provides an excellent way to prototype systems using the Compute Module 4.


Board cm4

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FINALLY! Native M.2 NVMe on a Raspberry Pi - CM4 TOFU

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