Answer to Question #258965 in Electrical Engineering for SUNNY

Question #258965

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


advantages and disadvantages of each?

1
Expert's answer
2021-10-31T00:05:19-0400

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.


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