... to as "U" shaped core board-U2440.micro2440 is a minimal system board, which contains the basic power supply circuit ... the BIOS (we use the supervivi), NAND FLASH programming which is a complete system program (bootloader, kernel, file system, etc.).micro2440sdk ( ... : Micro2440 floor layout and interface resources as shown above, it is a double-layer circuit board, in order to learn to develop user ...