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8051 MICROCONTROLLER

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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. Instruction execution requires movement of data from the external memory to the microprocessor or vice versa. Usually, microprocessors have good computing power and they have higher clock speed to facilitate faster computation. MICROCONTROLLER has required on-chip memory with associated peripherals.

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

  Microcontrollers, 8051, 8051 microcontroller

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