Mc 51 instruction set of 8085

dress the next instruction to be executed, and this procedure will be repeated for every instruction in the program. 8080 instructions may require 1, 2, or 3 bytes to encode an in­ struction; in each case the program counter is automatically advanced to the start of the next instruction, as illustrated in Figure 1-1. 8085 is pronounced as "eighty-eighty-five" microprocessor. It is an 8-bit microprocessor designed by Intel in 1977 using NMOS technology. It is an 8-bit register used to perform arithmetic, logical, I/O & LOAD/STORE operations. It is connected to internal data bus & ALU. As the name suggests, it Logical instructions are the instructions which perform basic logical operations such as AND, OR, etc. In 8085 microprocessor, the destination operand is always the accumulator. Here logical operation works on a bitwise level The SJMP instruction transfers execution to the specified address. The address is calculated by adding the signed relative offset in the second byte of the instruction to the address of the following instruction. The range of destination addresses is from 128 before the next instruction to 127 bytes after the next instruction. Microprocessor - 8085 Control Instructions - Following is the table showing the list of Control instructions with their meanings. Home. Jobs. Set interrupt mask: This instruction is used to implement the interrupts 7.5, 6.5, 5.5, and serial data output. 8085 Instruction Set Page 1 8085 INSTRUCTION SET INSTRUCTION DETAILS DATA TRANSFER INSTRUCTIONS Opcode Operand Description Copy from source to destination MOV Rd, Rs This instruction copies the contents of the source M, Rs register into the destination register; the contents of Rd, M the source register are not altered. If one of the operands is a 07 Memory and IO Interfacing 8085 Microprocessor ies ese ugc net computer science - Duration: 21:46. DigiiMento: GATE, NTA NET & Other CSE Exam Prep 37,314 views An Instruction Set is unique to a family of computers. This tutorial introduces the 8051 Microcontroller Instruction Set also called as the MCS-51 Instruction Set. As the 8051 family of Microcontrollers are 8-bit processors, the 8051 Microcontroller Instruction Set is optimized for 8-bit control applications. These are 1- byte instructions. Ex: ABA adds the contetns of accumulators and stores the result in accumulator A IMM - Immediate In immediate addressing, operand is located immediately after the opcode in the second byte of the instruction in program memory (except LDS and LDX where the operand is in the second and third bytes of the instruction). The 8051 Instruction Set Manual explains the standard 8051 instructions. The 8051 Instruction Set is supported by the Keil Ax51 Macro Assembler and the in-line Assembler of the Keil Cx51 Compiler. This manual contains the following chapters: Architecture Overview describes the memory layout and CPU registers of several 8051 variants. The instruction-decoding unit, decodes the instructions and provides information to timing and control unit to take further actions. INSTRUCTION FORMAT OF 8085 The 8085 have 74 basic instructions and 246 total instructions. The instruction set of 8085 is defined by the manufacturer Intel Corporation. Each instruction of 8085 has 1 byte opcode Instruction set of 8085 1. Instruction Set• Prof. Rajesh R.K.• Assistant Professor,• Department of MCA• Mohandas College of Engineering &Technology, Thiruvananthapuram, Kerala 2. Instruction• An in