The 8051 Microcontroller and Embedded Systems, Volume 1For 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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Page 76
... 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 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 ...
Page 77
... 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 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 ...
Page 81
... 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 ...
... 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 ...
Contents
CHAPTERS | 1 |
The 8051 Microcontrollers | 23 |
THE 8051 MICROCONTROLLERS 223 Section 1 1 Microcontrollers and Embedded Processors | 24 |
Copyright | |
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Other editions - View all
The 8051 Microcontroller and Embedded Systems: Using Assembly and C Mazidi Muhammad Ali No preview available - 2007 |
Common terms and phrases
ACALL ACALL DELAY addr addressing mode ASCII Assembly language baud rate binary bit addresses carry flag Chapter CJNE connected convert data pins decimal decoder discussed DJNZ DPTR EPROM Example execution external interrupt Figure flag bit frequency I/O ports instruction INT1 Intel interfacing interrupt vector table jump latch LCALL LJMP load logic loop machine cycle memory chip memory location microcontroller microprocessor MOV P1 MOV RO MOVX Notice NV-RAM on-chip ROM opcode operand output pointer program counter PSEN pull-up resistors pulse RAM location register bank reset Review Questions SBUF SECTION serial communication SETB TR1 Show signal SJMP Solution square wave stack stepper motor stop bit SUBB subroutine target address TCON timer Timer/counter TMOD transfer transistors True or false voltage Write a program