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List all the main functions of I/O module and describe all functions limited to two sentences

List all the main functions of I/O module and describe all functions limited to two sentences

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1.Processor Communication: It contains several activities such as the data transfer,decoding commands passed with the processor and recognizing the address  

2.Device communication: it is required to do the basic device interactions like status reporting.

3.Control and Timing: should be apt to handle the data flow in the middle of internal resources and external devices.

4.Data buffering: A unique function which handles the speed difference which is present among the processor ,memory and peripheral utensils.

5.Error Detection: It is employed for find and notice the errors for a processor.

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