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Figure 1.3 shows a simplified block diagram of the Pentium processor and a simple comparison between the 8051 and the Pentium is given in the table below. Where the 8051 microcontroller represents the low end of the market in terms of processing power, the Pentium processor is one of the most complex processors in the world. Figure 1.2 8051 chip with external memory8051 Tutorial D.Heffernan 2000, 2001 2Ī quick comparison with the well known Pentium processorA modern PC is powered by a Pentium processor (or equivalent), which is really a very powerful microprocessor. Within the chip but such enhanced features will not be considered right now. Also, variants of the chip will allow a lot more memory devices and I/O devices to be accommodate A D D R E S S B U S (1 6 -b i t)12M H zĮ xtern al DATA M em o ry (R A M )c o n tr o l li n e sĭ A T A B U S (8 -b it)I/O p o r ts e. Note part of the external code memory can be located within the chip but we will ignore this feature for now. Figure 1.2 shows the external code memory and data memory connected to the 8051 chip. I n s t r u c t io n d e c o d e r/ c o n t r o l lo g ic PSW fl a g sC AC F0 R S1 R S2 O V Pįigure 1.1 8051 functional block diagram.
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In te r n a l d a ta b u sIn s tr u c tio n R e g is te r I- R A M G e n e r a l R e g is te r s STAC K B i t- a d d r e s s a b le S F R s e tc. The internal components of the chip are shown within the broken line box.A D D R E S S B U S ( E x te r n a l ) 1 6 b i tIn te rn a l M e m o ryM e m o ry A dd re s s R e g is t e r (U s e s P 0 a n d P 2 )
KOMIK DONAL BEBEK PDF SERIAL
CONTENTSChapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Appendix A Appendix B Appendix C 8051 Microcomputer Overview A Simple Design Example Software Delay Routines Interrupts Timer/Counters The 8051 Serial Port Example Term Assignments Sample Exam Questions & Answers A Brief Introduction to Using Keil Tools 6 31 36 45 53 65 A1 B1 C1ġ.1 INTRODUCTION Figure 1.1 shows a functional block of the internal operation of an 8051 microcomputer.