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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Ist SECTION 2.4 : THE PROGRAM COUNTER AND ROM SPACE IN THE 8051 In this section we examine the role of the program counter ( PC ) register in executing an 8051 program . We also discuss ROM memory space for various 8051 family members .
... enable control TMOD Timer / counter mode control TCON * Timer / counter control T2CON * Timer / counter 2 control T2MOD Timer / counter mode control THO Timer / counter 0 high byte TLO Timer / counter 0 low byte THI Timer / counter ...
In mode 1 , the counter rolls over when the counter goes from 7. In mode 2 , the counter rolls over when the counter goes from to 8. In the instruction “ MOV TH1 , # -200 ” , find the hex value for the TH register . 9.
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The 8051 Microcontrollers
8051 ASSEMBLY LANGUAGE PROGRAMMING
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