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Department Of Electronics

ELECTRONICS SEM IV & SEM VI-SYLLABUS

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January 16, 2019

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UNIT-III Addressing modes & Instruction set

February 12, 2019

** 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. ...

UNIT-II MICROCONTROLLER NOTES

February 12, 2019

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 ...

8051 MICRO CONTROLLER INSTRUCTIONS

February 13, 2019

8051 Instruction Set ARITHMETIC OPERATIONS Mnemonic Description ADD A,Rn Add register to Accumulator ADD A,direct Add direct byte to Accumulator ADD A,@Ri Add indirect RAM to Accumulator ADD A,#data Add immediate data to Accumulator ADDC A,Rn Add register to Accumulator with Carry ADDC A,direct ...