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
Results 1-3 of 59
Page 68
... jump if A = 0 ; A = R1 = OVER : In this program , if either RO or R1 is zero , it jumps to the label OVER . Notice ... jump if A = 0 Table 3-1 : 8051 Conditional Jump Instructions Instruction JZ JNZ DJNZ CJNE A , byte Action # Jump ...
... jump if A = 0 ; A = R1 = OVER : In this program , if either RO or R1 is zero , it jumps to the label OVER . Notice ... jump if A = 0 Table 3-1 : 8051 Conditional Jump Instructions Instruction JZ JNZ DJNZ CJNE A , byte Action # Jump ...
Page 69
... jump if CY = 0 ; If CY = 1 then increment R5 ( R5 = 1 ) ; A = 6E + E2 = 50 and CY = 1 jump if CY = 0 ; if CY = 1 , increment 5 ; Now RO = 50H , and R5 = 02 All conditional jumps are short jumps It must be noted that all conditional jumps ...
... jump if CY = 0 ; If CY = 1 then increment R5 ( R5 = 1 ) ; A = 6E + E2 = 50 and CY = 1 jump if CY = 0 ; if CY = 1 , increment 5 ; Now RO = 50H , and R5 = 02 All conditional jumps are short jumps It must be noted that all conditional jumps ...
Page 340
... jump In this type of jump , control is transferred to a target address if certain con- ditions are met . The target address cannot be more than -128 to +127 bytes away from the current PC . JC JNC JZ JNZ JNB bit JB bit JBC bit DJNZ ...
... jump In this type of jump , control is transferred to a target address if certain con- ditions are met . The target address cannot be more than -128 to +127 bytes away from the current PC . JC JNC JZ JNZ JNB bit JB bit JBC bit DJNZ ...
Contents
CHAPTERS | 1 |
The 8051 Microcontrollers | 23 |
THE 8051 MICROCONTROLLERS 2323 Section 1 1 Microcontrollers and Embedded Processors | 24 |
Copyright | |
19 other sections not shown
Other editions - View all
The 8051 Microcontroller And Embedded Systems Using Assembly And C, 2/E Muhammad Ali Mazidi,Mazidi 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 transistors True or false voltage Write a program