Preface¶

Welcome to the LattePanda Mu Carrier Board Design Guide.

This guide is designed to provide hardware engineers with critical design rules and recommendations to facilitate the efficient development of custom carrier boards.

Pinout Documentation¶

Given the high-density edge connector and the versatile pin definitions of the LattePanda Mu compute module, we provided the detailed pin introduction into a separate document.

Please consult LattePanda Mu Pinout Documentation thoroughly before starting your design.

HSIO Multiplexing Rules¶

The High-Speed I/O (HSIO) lanes on the LattePanda Mu offer great flexibility, but their configuration mechanism requires specific attention:

• BIOS Firmware Defined Entirely: HSIO lanes can be multiplexed as USB 3.2, PCIe, or SATA. However, this allocation is static and determined entirely by the BIOS firmware. HSIO function and PCIe bifurcation cannot be configured dynamically via the BIOS Setup Menu. Thus, customized BIOS firmware is required for any HSIO or PCIe bifurcation configuration changes.
• Recommendation: When assigning HSIO pins in your schematic, strictly refer to the HSIO Multiplexing chapter of this guide and check Released BIOS Firmware Versions to ensure your hardware design matches the available firmware configurations or determine if customized firmware is required to support your setup.

Reference Design & PCB Requirements¶

• Open Source Reference: To better understand the circuit details, we strongly recommend reading this guide alongside the engineering documents (Schematic & PCB) of the open-source DFR1142 Lite Carrier Board.
• PCB Stack-up: The carrier board design involves high-frequency signals such as HDMI 2.1, USB 3.2 (10Gbps), and PCIe 3.0. Signal integrity is paramount.
  • Layer Count: A PCB stack-up of 4 layers or more is highly recommended.
  • Quality: Proper impedance control and a continuous, solid GND reference plane are mandatory.

Community & Support¶

This guide is a living resource and will be updated irregularly based on user feedback and firmware iterations.

If you encounter any issues, have suggestions, or want to share your new ideas, please join our vibrant community.

Now let's explore the charm of LattePanda Mu compute module together!🤝