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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TMOD ( timer mode ) register Both timers 0 and 1 use the same register , called TMOD , to set the various timer operation modes . TMOD is an 8 - bit register in which the lower 4 bits are set aside for timer 0 and the upper 4 bits are ...
X Mode selection of the 8255 While ports A , B , and C are used to input or output data , it is the control register that must be programmed to select the operation mode of the three ports . The ports of the 8255 can be programmed in ...
7 Serial Port mode specifier . ( NOTE 1 ) . SCON . 6 Serial Port mode specifier . ( NOTE 1 ) . SCON . 5 Enables the multiprocessor communication feature in modes 2 & 3. In mode 2 or 3 , if SM2 is set to I then RI will not be activated ...
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The 8051 Microcontrollers
8051 ASSEMBLY LANGUAGE PROGRAMMING
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