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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... Machine cycle For the CPU to execute an instruction takes a certain number of clock cycles . In the 8051 family , these clock cycles are referred to as machine cycles . Appendix A.2 provides the list of 8051 instructions and their ...
... machine cycle lasts 12 oscillator periods . Therefore , to cal- culate the machine cycle , we take 1/12 of the crystal frequency , then take its inverse , as shown in Example 3-13 . Example 3-13 The following shows crystal frequency for ...
... machine cycle = 1.2 μs . 28. Find the machine cycle if crystal frequency is 18 MHz . 29. Find the machine cycle if crystal frequency is 12 MHz . 30. Find the machine cycle if crystal frequency is 25 MHz . DELAY : delay subroutine shown ...
The 8051 Microcontrollers
THE 8051 MICROCONTROLLERS 223 Section 1 1 Microcontrollers and Embedded Processors
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