Special input/output

Special input/output (Special I/O or SIO) are inputs and/or outputs of a microcontroller designated to perform specialized functions or have specialized features.[1]

Specialized functions can include:

Some kinds of special I/O functions can sometimes be emulated with general-purpose input/output and bit banging software.

See also


  1. Special Microcontroller Functions, retrieved 29 October 2011

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