An F64 programming board (often called an F64 ISP / IC programming board) is a specialized hardware accessory used with the Flash64 (F64) programmer for advanced mobile phone memory repair.

What it is
A small PCB (printed circuit board) designed to connect directly to memory chips
Works together with an F64 programmer box (Lite or Ultra)
Used to read, write, and repair NAND memory chips (like eMMC and UFS