The embedded microprocessor has been packed in BGA for convenient overseas shipping. 266MHz Hz is the frequency at which the CPU operates. To learn about the functions of the pins 256 please refer to their datasheets. There are many applications that use the CPU with Surface Mount mounted. 1.2V is the CPU core voltage.
IDT79RC32H434-266BCG Features
IDT79RC32H434-266BCG Applications
There are a lot of Integrated Device Technology (IDT) IDT79RC32H434-266BCG Microprocessor applications.