The 8051 Microcontroller and Embedded Systems, Volume 1
Prentice Hall, 2000 - Digital control systems - 435 pages
For courses teaching the 8051 Microcontoller.
This book uses a step-by-step approach to teach the fundamentals of assembly language programming and interfacing of the 8051 microcontroller. It uses many examples to clarify concepts. Simple, concise examples are utilized to show what action each instruction performs, then a sample is provided to show its application. This text provides a comprehensive understanding of the internal organization of the 8051 registers and resources in a way that sheds the student's fear of assembly language. Whether students become designers of stand-alone systems or complex embedded systems, they will find this text a useful resource.
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Example 2-2 Show the status of the CY , AC , and P flags after the addition of 38H and 2FH in the fol- lowing instructions . MOV A , # 38H ADD A , # 2FH ; after the addition A = 67H , CY = 0 Solution : 88858 38 00111000 00101111 67 ...
In Section 6.1 we discuss instructions and programs related to addition and subtraction of unsigned numbers , including BCD ( binary coded dec- imal ) data . Multiplication and division are explored in Section 6.2 .
In the 8051 the instruction " DA A❞ is designed to correct the BCD addition problem . This is dis- cussed next . = DA instruction The DA ( decimal adjust for addition ) instruction in the 8051 is provided to correct the aforementioned ...
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The 8051 Microcontrollers
THE 8051 MICROCONTROLLERS 223 Section 1 1 Microcontrollers and Embedded Processors
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