Using appropriate illustrations show how an 8255A could be connected to an 8051 microcontroller I/O pins in memory-mapped and port-mapped configurations. Briefly explain the significance of the MOVX instruction in relation to these two configurations.

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Using appropriate illustrations show how an 8255A could be connected to an 8051
microcontroller I/O pins in memory-mapped and port-mapped configurations. Briefly
explain the significance of the MOVX instruction in relation to these two configurations. 

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