The 8051 Microcontroller and Embedded Systems, Volume 1
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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To make sure that after execution of the called subroutine the 8051 knows where to come back to , it automatically saves on the stack the address of the instruction immediately below the LCALL . When a subroutine is called , control is ...
The last instruction of the called subroutine must be a RET instruction which directs the CPU to POP the top bytes ... 09 00 08 07 SP = 09 Use of PUSH and POP instructions in subroutines Upon calling a subroutine , the stack keeps track ...
LCD 2 lines , 5x7 matrix ACALL COMNWRT ; call command subroutine ACALL DELAY ; give LCD some time MOV A , #OEH ; display on , cursor on ACALL COMNWRT ; call command subroutine ACALL DELAY ; give LCD some time MOV A , # 01 ; clear LCD ...
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The 8051 Microcontrollers
8051 ASSEMBLY LANGUAGE PROGRAMMING
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