Nano Base Board A for CM5

This Nano Base Board for CM5 is a compact carrier for all CM5 variants, featuring USB 3.2 Gen1, USB-C, microSD slot, dual MIPI, 40-pin GPIO, fan and RTC headers, BOOT button, and logic level selection.

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The Nano Base Board (A) for CM5 is a compact IO board for the Raspberry Pi Compute Module 5, matching the module’s footprint while providing the essential interfaces needed for development or integration. Despite its small size (55x40mm), it includes USB 3.2 Gen1, dual MIPI connectors, 40-pin GPIO (and a colour-coded header included), and power management features. No HDMI is available on this board.

It supports all CM5 variants and includes a slot for a MicroSD card, for Lite versions without eMMC. A USB-C port is used for both power input and flashing, with a BOOT button to trigger flash mode. A full-size USB-A port offers high-speed connectivity with up to 2A output.

The board also includes a 4-pin fan header, a header for an RTC battery, and dual-colour status LED. Developers can access special function pins for ETH sync and CM5 power control, and logic level selection between 3.3V and 1.8V.

If you don’t need HDMI output, this is about as compact a carrier can get for your CM5!

CM5 not included

Features

• Compact IO board for Raspberry Pi Compute Module 5
• Supports all CM5 variants, including Lite
• USB-C for power input and flashing
• 1x USB-A port with up to 2A output
• USB 3.2 Gen1 support
• Dual MIPI connectors
• 40-pin GPIO header
• BOOT button for flash mode
• 4-pin fan header and RTC battery header
• Dual-colour status LED
• Logic level selection: 3.3V or 1.8V
• Access to ETH sync and CM5 power control pins
• No HDMI output

What’s onboard?

1. CM5 socket
   • Suitable for all variants of Compute Module 5
2. USB port
   • USB 3.2 Gen1 high-speed interface, for connecting various USB devices
3. TF card slot
   • For connecting a TF card with pre-burnt image (Lite variant only)
4. Power supply / Programming
   • 5V power supply, or used for eMMC burning
5. FAN header
   • 4-pin JST-SH PWM fan header for connecting a cooling fan
6. PSW button
   • Power button
7. BOOT button
   • Press before powering on and release after powering on to enter the burning mode
8. 2PIN JST-SH RTC battery header
9. 40PIN GPIO interface
   • Suitable for connecting to various HAT modules
10. Dual MIPI interfaces
    • For connecting to DSI displays or CSI cameras
11. Special function pins
    • CM5 core power enable and ETH SYNC signal
12. IO-VREF selection
    • CM5 IO logic level: 3.3V or 1.8V
13. Function enable pins
    • Enabled by default, can be disabled by shorting the corresponding pads
14. Dual-colour LED indicator
    • Red light: Raspberry Pi power indicator
    • Green light: Raspberry Pi working status indicator

Specifications

CM5 socket	Suitable for all variants of Compute Module 5
Connector	Raspberry Pi 40-pin GPIO interface
USB	USB 3.2 Gen1 Type A port
MIPI	2x MIPI 4-lane interface (22-pin 0.5mm FPC connector)
Storage	MicroSD card socket for CM5 Lite (without eMMC) variants
Power input	5V
Dimensions	55x40mm

Resources

• Product Wiki

Package Contents

• 1x Nano Base Board A for CM5
• 1x Colour-coded GPIO header

CM5 not included