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 87
... up resistor . This is due to the fact that PO is an open drain , unlike P1 , P2 , and P3 , as we will soon see ... pull - up resistors . See Figure 4-4 . In this way we take advantage of port 0 for both input and output . With external pull ...
... up resistor . This is due to the fact that PO is an open drain , unlike P1 , P2 , and P3 , as we will soon see ... pull - up resistors . See Figure 4-4 . In this way we take advantage of port 0 for both input and output . With external pull ...
Page 88
... pull - up resistors since it already has pull - up resistors internally . Upon reset , port 1 is configured as an output port . For example , the following code will continuously send out to port 1 the alternating values 55H and AAH ...
... pull - up resistors since it already has pull - up resistors internally . Upon reset , port 1 is configured as an output port . For example , the following code will continuously send out to port 1 the alternating values 55H and AAH ...
Page 389
... pull - up resistors . ( The reason is to allow it to multiplex address and data . See Chapter 14 for a detailed discussion of address / data muliplexing . ) Since PO has no internal pull - up resistors , it is simply an open - drain as ...
... pull - up resistors . ( The reason is to allow it to multiplex address and data . See Chapter 14 for a detailed discussion of address / data muliplexing . ) Since PO has no internal pull - up resistors , it is simply an open - drain as ...
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, 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 transfer transistors True or false voltage Write a program