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. |
From inside the book
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Page 131
... CJNE destination , source , relative address In the 8051 , the actions of comparing and jumping are combined into a sin- gle instruction called CJNE ( compare and jump if not equal ) . The CJNE instruc- tion compares two operands , and ...
... CJNE destination , source , relative address In the 8051 , the actions of comparing and jumping are combined into a sin- gle instruction called CJNE ( compare and jump if not equal ) . The CJNE instruc- tion compares two operands , and ...
Page 332
... CJNE A , # data , target CJNE A , # 96 , NEXT CJNE A , direct , target ; JUMP IF A IS NOT 96 Example : = CJNE A , 40H , NEXT ; WITH THE VALUE ; JUMP IF A NOT HELD BY RAM LOC . 40H Notice the absence of the " # " sign in the above ...
... CJNE A , # data , target CJNE A , # 96 , NEXT CJNE A , direct , target ; JUMP IF A IS NOT 96 Example : = CJNE A , 40H , NEXT ; WITH THE VALUE ; JUMP IF A NOT HELD BY RAM LOC . 40H Notice the absence of the " # " sign in the above ...
Page 426
... CJNE A. → SWAP DA CLR AB CPL A , #data AB #data , rel A A [ 2B , 4C ] A [ 28 ] [ 4C ] A [ 3B , 2C ] MOV SUBB CJNE XCH DJNZ MOV MOV 5 dir , dir A , dir A , dir , rel A , dir dir , rel A , dir dir , A [ 38 , 2C ) [ 2B ] [ 38 , 2C ) [ 28 ] ...
... CJNE A. → SWAP DA CLR AB CPL A , #data AB #data , rel A A [ 2B , 4C ] A [ 28 ] [ 4C ] A [ 3B , 2C ] MOV SUBB CJNE XCH DJNZ MOV MOV 5 dir , dir A , dir A , dir , rel A , dir dir , rel A , dir dir , A [ 38 , 2C ) [ 2B ] [ 38 , 2C ) [ 28 ] ...
Contents
CHAPTERS | 1 |
The 8051 Microcontrollers | 23 |
THE 8051 MICROCONTROLLERS 223 Section 1 1 Microcontrollers and Embedded Processors | 24 |
Copyright | |
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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