ELECTRONICS SEM IV & SEM VI-SYLLABUS



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8051 MICRO CONTROLLER & INTERFACING IMPORTANT QUESTIONS-2019.

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UNIT-II MICROCONTROLLER NOTES

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Unit: 2 Micro Controller Architecture **Explain the overview of 8051 microcontroller.              The microcontroller is a programmable IC manufactured by VLSI technique and capable of performing arithmetic and logical operations.              The basic functional blocks of a microcontroller are ALU, Flag register, Register array, program counter (PC), Instruction decoding unit, timing and control unit, RAM memory, EPROM/EEPROM memory, parallel I/O port, serial I/O port, programmable timer, ADC and DAC. But all the microcontrollers may not have all the blocks.             In microcontroller ALU performs arithmetic and logical operations. Flag register : The various conditions of the result are stored as status bits in flag register. Register array & Internal   RAM   memory are used ...
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UNIT-III Addressing modes & Instruction set

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** Explain 8051 instruction set (or) classification of 8051 instruction set (or) types of instructions.             Depending on operation   all instructions are divided in fivel groups: ·          Data Transfer Instructions ·          Arithmetic Instructions ·          Logic Instructions ·          Branch Instructions ·          Bit-oriented Instructions (or) Boolean instructions. Data   Transfer instructions :                      In 8051 microcontroller MOV,MOVC,MOVX,PUSH,POP,XCH and XCHD instructions are used to transfer data between registers and memory locations.        ...
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