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8051 Microcontroller Instruction Set. 1-7. Atmel 8051 Microcontrollers Hardware Manual. 0509C–8051–07/06. Table 1-4. Instruction Opcodes in Hexadecimal Bytes, Lists the number of bytes required to encode the instruction. ; Cycles, Lists the number of instruction cycles required to execute the instruction. Note The microcontroller 8051 instructions set includes 110 instructions, Example : MOV DPTR, #2476 H : This instruction will load the immediate data 2476. 1. Microprocessors 1 The 8051 Instruction Set Microprocessors 1 Msc. · 2. Instruction Groups • The 8051 has 255 instructions – Every 8-bit opcode from 00 to FFThe 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 See the 8051 Architecture course for a more in depth look at the core. Page 5. 5. 5. Sample Memory Organization. The complete 8051 Instruction Set or all 8051 instructions are broadly classify in to four groups data moving, logical, arithmetic and branching. Data moving /