The ’54x device architecture is built around eight major 16-bit buses:
✔ One program-read bus (PB) which carries the instruction code and immediate operands from program memory
✔ Two data-read buses (CB, DB) and one data-write bus (EB), which interconnect to various elements, such as the CPU, data-address generation logic (DAGEN), program-address generation logic (PAGEN),on-chip peripherals, and data memory
✔ The CB and DB carry the operands read from data memory.The EB carries the data to be written to memory.
✔ Four address buses (PAB, CAB, DAB, and EAB), which