The 8051 Microcontroller and Embedded

Department of Computer Scien

ce and Information Engineering

National Cheng Kung University, TAIWAN

HANEL

INSIDE THE COMPUTERInternal Working of Computers(cont’)

Ex. (cont’)5.
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Address 1404H is put on the address bus and the code is fetched into the CPU, decoded, and executedƒ
This code is again adding a value to register A
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The program counter is updated to 1406H
6.
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The contents of address 1406 are fetched in and executed
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This HALT instruction tells the CPU to stop incrementing the program counter and asking for the next instruction