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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... I / O ports on the chip itself . For this reason , they are com- monly referred to as general - purpose microprocessors . Data bus CPU CPU RAM ROM General- Purpose Micro- RAM ROM I / O Timer Serial COM Port Port I / O Timer Serial ...
... I / O ports and bit - addressability The 8051 has four I / O ports , each of which is 8 bits : P0 , P1 , P2 , and P3 . We can access either the entire 8 bits or any single bit without altering the rest . When accessing a port in a ...
... of the 8255. We must first find the port addresses assigned to each of ports A , B , C , and the con- trol register . This is called mapping the I / O port . As can be seen from Figure 15-4 , the 8255 is connected to an 8031/51 as if it ...
The 8051 Microcontrollers
THE 8051 MICROCONTROLLERS 223 Section 1 1 Microcontrollers and Embedded Processors
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