TMS320C54x Overview The C54x has a high degree of operational flexibility and speed. It combines an advanced modified Harvard architecture (with one program memory bus, three data memory buses, and four address buses), a CPU with applicationspecific hardware logic, on-chip memory, on-chip peripherals, and a highly specialized instruction set. Spinoff devices that combine the C54x CPU with customized on chip memory and peripheral configurations have been, and continue to be, developed for specialized areas of the electronics market.