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Input/Output Ports

Bi-directional Input and Output (I/O) ports couple the microcontroller to external devices. This interface can operate in parallel or serial form and is usually digital (0 to +5Vdc) logic. Parallel interfaces allow I/O data transfer of eight bits at a time to parallel ports on the microcontroller. The technology is typically used to transfer data between the microcontroller and the external logic it controls.

last update: 10JUL1997