Ports are the means through which the microcontroller communicates with the outside world. They are the most common I/O devices. An interesting point to note is that the number of I/O pins or ports are decided by the packaging style of the microcontroller. A comparison of various packages is given below: A new trend in 8-bit controller design is to place the chip inside a 20-, 16-, or even 8-pin PDIP or SOP package, allowing for very small and cheap embedded systems to be constructed [29].
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(2007). Exploring the Capabilities of On-Chip Resources Programming for I/O Ports, Interrupts and Timer/Counter. In: Exploring C for Microcontrollers. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6067-0_4
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DOI: https://doi.org/10.1007/978-1-4020-6067-0_4
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