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 24
... I / O ports on the chip itself . For this reason , they are com- monly referred to as general - purpose microprocessors . Data bus CPU CPU RAM ROM General- Purpose Micro- RAM ROM I / O Timer Serial COM Port Port I / O Timer Serial ...
... I / O ports on the chip itself . For this reason , they are com- monly referred to as general - purpose microprocessors . Data bus CPU CPU RAM ROM General- Purpose Micro- RAM ROM I / O Timer Serial COM Port Port I / O Timer Serial ...
Page 144
... I / O ports and bit - addressability The 8051 has four I / O ports , each of which is 8 bits : P0 , P1 , P2 , and P3 . We can access either the entire 8 bits or any single bit without altering the rest . When accessing a port in a ...
... I / O ports and bit - addressability The 8051 has four I / O ports , each of which is 8 bits : P0 , P1 , P2 , and P3 . We can access either the entire 8 bits or any single bit without altering the rest . When accessing a port in a ...
Page 306
... of the 8255. We must first find the port addresses assigned to each of ports A , B , C , and the con- trol register . This is called mapping the I / O port . As can be seen from Figure 15-4 , the 8255 is connected to an 8031/51 as if it ...
... of the 8255. We must first find the port addresses assigned to each of ports A , B , C , and the con- trol register . This is called mapping the I / O port . As can be seen from Figure 15-4 , the 8255 is connected to an 8031/51 as if it ...
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