The 8051 microcontroller and embedded systems using assembly and c 2nd ed by mazidi

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Among, the lot many of microcontroller, 8051 is one of the most popular 8-bit microcontroller. Due to it can address 128kByte of external memory and has a basic instruction time of 1 microsecond. Assembly language is the language, mixture of machine level and higher level programming language called middle language. Thus the list of specific instructions selected from those allowed by the microcontroller manufacturer and organized to control operation constitute computer software. Here we are using multiplexing instruction for two 32-Bit multi plication operation along with other necessary instruction set. This two 32-Bit data will result in (32+32) 64-Bit answer. Keywords— Microcontroller, Programming Language, Memory, Assembler, Cross Assembler, Register, Register Bank, PSW

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