Answer to Question #258965 in Electrical Engineering for SUNNY

Question

What is the difference between isolated I/O and memory-mapped I/O? What are the

advantages and disadvantages of each?

Answer 1

Isolated I/O is complicated since different logic is utilized to regulate both. Memory Mapped I/O As I/O is also considered as memory only, simpler logic is employed.

The Benefits of Isolated I/O

Map of Memories It becomes difficult for the computer to distinguish I/O operations from other software alternatives accessing memory in a memory-mapped system; isolated-memory systems do not have this difficulty.

Programming

Memory Area.

The benefit of memory-mapped I/O is that any instruction or addressing mode may be used to access I/O. This simplifies programming. Many microprocessors provide limited instructions and addressing modes for I/O access when Direct I/O is available.