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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Port 0 as input Vcc 10K Port 0 With resistors connected to port 0 , in order to make it an input , P0.0 ) the port must be proPO.1 DS5000 grammed by writing 1 to PO.2 8751 P0.3 all the bits . In the follow8951 P0.4 ing code , port 0 is ...
Port 1 as input To make port 1 an input port , it must programmed as such by writing 1 to all its bits . The reason for this is discussed in Appendix C.2 . In the following code , port 1 is configured first as an input port by writing ...
SUMMARY This chapter described how to expand the I / O ports of the 8031/51 by connecting it to an 8255 chip . The 8255 could then be programmed as a simple I / O port to control interfaced devices such as stepper motors , LCDs , and ...
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The 8051 Microcontrollers
8051 ASSEMBLY LANGUAGE PROGRAMMING
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