I've been working on a compact 50mm × 50mm FPGA module built around the Lattice ECP5 LFE5UM-85F (85K LUTs, 3.9Mb RAM, 108 DSP blocks). The board uses an 8-layer PCB with LPDDR3 memory running at 1.35V, integrated FTDI FT2232H for USB programming and debug , and high-speed expansion connectors for MIPI CSI-2/DSI and LVDS interfaces. I've already assembled most of the PCB and fully validated the power system - all voltage rails (1.1V , 2.5V ,3.3V, 1.35V LPDDR3, configurable I/O banks) are stable and clean with proper sequencing.
Currently waiting to source the main FPGA chip before I can do the full bring-up. Once it arrives, I'll populate the FPGA and memory, test the JTAG interface, initialize the LPDDR3, and start developing example applications. Planning to open-source the complete design (schematics, layout, BOM, example HDL projects) once everything's validated.