s3c2450 datasheet Around 400MHz @ 1.2V, 533MHz @ TBDV Core, 1.8V/2.5V/3.0V/3.3V ROM/SRAM, 1.8V/2.5V/3.3V mSDR/mDDR/DDR2 SDRAM, 1.8V/2.5V/3.3V external I/O microprocessor with 16KB I/D-Cache/MMU