The 8051 Microcontroller and Embedded Systems, Volume 1
Prentice Hall, 2000 - Digital control systems - 435 pages
For 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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The 16 - bit register DPTR and register A are used to form the address of the data element stored in on - chip ROM . Because the data elements are stored in the program ( code ) space ROM of the 8051 , it uses the instruction MOVC ...
ROW 0 : MOV DPTR , #KCODEO ; set DPTR = start of row 0 SJMP FIND ; find col . key belongs to ROW 1 : MOV DPTR ... set DPTR = start of row 3 FIND : RRC A ; see if any CY bit low JNC MATCH ; if zero , get the ASCII code INC DPTR ; point ...
For the program in Example 15-3 , it is recommended that you use the EQU directive for port addresses as shown next . APORT BPORT CPORT CNT PORT EQU EQU EQU EQU 1000H 1001H 1002H 1003H MOV A , # 90H MOV DPTR , #CNT PORT MOVX ...
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The 8051 Microcontrollers
8051 ASSEMBLY LANGUAGE PROGRAMMING
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