The Waveshare Mini Base Board (A) is an expansion board for the Raspberry Pi Compute Module 5 (CM5) that offers a range of features packed onto a compact carrier, allowing extensive prototyping or general breakout usage of your CM5. Key features include 2x USB 3.2 Gen1 ports, a full-size HDMI port, a second HDMI port via FFC, Gigabit Ethernet, RTC battery holder and PCI-e interface. MIPI DSI and CSI connectors enable display and camera integration, while the MicroSD card slot provides flexible storage/boot options. Power is supplied via USB-C (we recommend the Raspberry Pi 27W PSU), with a fan header for cooling and mounting holes for installation. Compute Module 5 not included. What's Onboard? * CM5 socket: Suitable for all variants of Compute Module 5 * 40-pin GPIO header: For connecting various HAT / HAT+ modules * Power input/Programming: requires a 5V / 5A USB-C power supply (or used for eMMC burning) * PCIe interface: For connecting various PCIe expansion boards * PSW Power button: Long press to force power off, short press to soft power off or on * STAT LED: Dual-colour status LED * BOOT button: Press before powering on and release after powering on to enter the burning mode * Dual MIPI interfaces: For connecting DSI displays and CSI cameras * HDMI0 connector: HDMI0 port, supports 4K output * USB 3.2 Gen1 ports: 2x USB 3.2 Gen1 high-speed ports, supports 5Gbps synchronous operation * RJ45 Gigabit Ethernet port: Supports 10M / 100M / 1000M network access * 4-Pin JST-SH PWM Fan header: For connecting a cooling fan, 5V power supply * TF card slot: For connecting a MicroSD card with pre-burnt image (Lite variant ONLY) * IO-VREF selection: CM5 IO logic level: 3.3V (default) or 1.8V * Other function pins: WIFI / BT hardware disable or write protection * HDMI1 FFC connector: HDMI1 port, supports 4K output, can be connected through an adapter * USB 2.0 FFC connector: Can be connected through an adapter * RTC battery holder: Supports rechargeable ML1220 button cell Resources * Product Wiki * Dimensions * Schematic * 3D Model Package Contents * 1x Mini Base Board (A) for CM5 * 4x Standoffs * 4x Screws Compute Module 5 not included https://elecena.pl/product/28644807/mini-base-board-a-for-raspberry-pi-cm5 2025-05-10 https://elecena.pl/product/28644807/mini-base-board-a-for-raspberry-pi-cm5 2025-11-29