8051 Instruction Set Manual

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.
• Opcodes lists all opcodes ordered by opcode HEX value.
• Instructions describes all of the 8051 instructions.