Introduction to I/O                                                                                                                                  Print this page
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Input/Output Modules                      

The major functions of an I/O module are categorized as follows –

      •  Control and timing
                       
      •  Processor Communication
                       
      •  Device Communication
                       
      •  Data Buffering
                       
      •  Error Detection

During any period of time, the processor may communicate with one or more external devices in unpredictable manner, depending on the program's need for I/O.

The internal resources, such as main memory and the system bus, must be shared among a number of activities, including data I/O.

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