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8051 MICROCONTROLLER

UNIT 58051 MICROCONTROLLERWhat is a MICROCONTROLLER ? A MICROCONTROLLER is a programmable digital processor with necessary peripherals. Both microcontrollers and microprocessors are complex sequential digital circuits meant to carry out job according to the program/ instructions. Sometimes analog input/output interface makes a part of MICROCONTROLLER circuit of mixed mode (both analog and digital nature).A MICROCONTROLLER can be compared to a Swiss knife with multiple functions incorporated in the same A MICROCONTROLLER compared with a Swiss knife microcontrollers Vs Microprocessors microprocessor requires an external memory for program/data storage.

Various features of 8051 microcontroller are given as follows: 8-bit CPU 16-bit Program Counter 8-bit Processor Status Word (PSW) 8-bit Stack Pointer Internal RAM of 128bytes Special Function Registers (SFRs) of 128 bytes 32 I/O pins arranged as four 8-bit ports (P0 - P3) Two 16-bit timer/counters : T0 and T1 Two external and three internal vectored interrupts

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