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3 Jan 2017 Instruction Format - 8051 Micro Controller. An instruction is a command to the microprocessor to perform a given task on a specified data. The 8051 instruction set is classified into the following three groups according to word size: A 1-byte instruction includes the opcode and operand in the same byte. Module 2 : Intel 8051 Microcontroller. Lecture 13 : 8051 Instruction Set #data16: Immediate 16-bit data available in the instruction. Addr11: 11-bit destination Atmel 8051 Microcontrollers Hardware. 1. 0509C–8051–07/06. Section 1. 8051 Microcontroller Instruction Set. For interrupt response time information, refer to 8051 Instruction Set. ? Introduction. ? CIP-51 architecture and memory organization review. ? Addressing modes. ? Register addressing. ? Direct addressing. The first part of each instruction, called MNEMONIC refers to the operation an For example: ADD A,R1 - The result of addition (A+R1) will be stored in the 23 Nov 2017 An 8051 Instruction consists of an Opcode (short of Operation – Code) followed by Operand(s) of size Zero Byte, One Byte or Two Bytes. The Op-Code part of the instruction contains the Mnemonic, which specifies the type of operation to be performed. Microcontroller Instruction Set. For interrupt response time information, refer to the hardware description chapter. Note: 1. Operations on SFR byte address 208 Alphabetical List of Instructions. ACALL - Absolute Call; ADD, ADDC - Add Accumulator (With Carry); AJMP - Absolute Jump; ANL - Bitwise AND Here one can find complete instruction set of 8051 microcontroller. Complete information regarding each instruction like operational explanation, addressing OPCODE. OPERAND. DESCRIPTION. NO. OF BYTES. ADD. A,Rn. Add register to Accumulator. 1. ADD. A,direct. Add direct byte to Accumulator. 2. ADD. A,@Ri.