Nano Base Board (B) for Raspberry Pi CM4

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The Nano base Board B is is 'big sister' to the Nano Base Board A, offering even more functionality and connectivity for your Raspberry Pi Compute Module 4 in a tiny CM4-sized package.

This board breaks out an impressive array of connectivity from your CM4, considering the compact footprint, allowing you to evaluate multiple elements of the latest Compute Module for your project's needs.

Just like the Nano Base Board A, this B version allows you to power your CM4 via USB-C whilst also providing a USB port, CSI camera connector, SD card slot, GPIO breakout, boot switch and indication LEDs. On top of this, it also provides a Gigabit Ethernet RJ45 jack, 3.5mm audio jack, Mini HDMI port, programmable button and a DSI display port!

Note: the GPIO header is packed with the board separately and will require soldering!


The Base Board B is the same overall size as the CM4 module yet offers a host of useful features:

  • 40-pin GPIO breakout
  • Male colour-coded GPIO pins (packaged separately - requires soldering)
  • USB-C 5V power port
  • Gigabit Ethernet RJ45 port
  • Camera CSI port
  • Display DSI port
  • Mini HDMI port
  • 3.5mm Audio jack
  • MicroSD card socket for CM4 Lite variants
  • 1x USB 2.0 port
  • Boot switch
  • User-programmable button
  • Power indication LED
  • Activity Indication LED
  • Dimensions: 55mm x 40mm

What's Onboard?

1) CM4 socket
 - Ssuitable for all variants of Compute Module 4
2) Micro SD card slot
 - For connecting a Micro SD card with pre-burnt image (Lite variant ONLY)
3) 40-pin GPIO header
 - For connecting sorts of HATs
4) Gigabit Ethernet RJ45 connector
5) Power supply / Programming
 - 5V power supply, or used for eMMC burning
6) 3.5mm audio jack
7) User button
8) USB2.0 connector
 - for connecting sorts of USB devices
9) CSI connector
 - MIPI CSI camera interface
10) DSI connector
 - MIPI DSI display interface
11) MP1658
12) Mini HDMI connector
 - Supports 4K 30fps output
13) BOOT switch
 - ON: Switch USB to Type C interface, will enter download mode when powered on (configured as a large-capacity disk through RPI boot)
 - OFF: Switch USB to Type A interface, will not enter download mode when powered on (booted from eMMC or Micro SD card)

Package Contents

  • 1x Nano Base Board (B) for CM4
  • 1x 40-pin colour-coded GPIO header

Compute Module 4 not included


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