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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... PSEN Another important signal for the 8031/51 is the PSEN ( program store enable ) signal . PSEN is an output signal for the 8031/51 microcontroller and must be connected to the OE pin of a ROM containing the program code . In other ...
... PSEN and RD signals to such a ROM ? Notice in the previous discussion that PSEN is used to access the external code space and the RD signal is used to access the external data space . To allow a single ROM chip to provide both program ...
... PSEN ? 39. Which of the following signals must be used in fetching program code from external ROM ? ( a ) RD ( b ) WR ( c ) PSEN 40. For the 8031 - based system with external program ROM , when the microcon- troller is powered up , it ...
The 8051 Microcontrollers
THE 8051 MICROCONTROLLERS 223 Section 1 1 Microcontrollers and Embedded Processors
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