8051 microcontroller has the following Advantages compare to other peripherals:-
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4 register banks
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128 bytes on-chip data memory (RAM)
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64K bytes program memory (ROM)
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8-bit bidirectional data bus
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16-bit unidirectional address bus
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32 general purpose registers each of 8-bit
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Three internal and two external Interrupts
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16 bit Timers (usually 2, but may have more or less)
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Four 8-bit ports,(short model have two 8-bit ports)
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16-bit program counter and data pointer
