8051 LEARN YOURSELF - TUTORIAL part 2 - SFR DESCRIPTION - 8051 INSTRUCTION SET SUMMARY

            This part briefs briefs about the different SFRs & its description and Instruction Set summary.

 Special Function Registers

          The 8051 operations that do not use the internal 128-byte RAM addresses from 00h to 7Fh are done by a group of specific internal registers, each called a special-function register (SFR), which may be addressed much like internal RAM, using addresses from 80h to FFh. This feature allows the programmer to change only what needs to be altered, leaving the remaining bits in that SFR unchanged. Not all of the addresses from 80h to FFh are used for SFRs, and attempting to use an address that is not defined, or "empty," results in unpredictable results. In Figure 2.1b, the SFR addresses are shown in the upper right corner of each block. 

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8051 LEARN YOURSELF - TUTORIAL part 1

            This part briefs gives the introduction of 8051, architecture, Stack and its memory organization. The next part will contain the SFR description and Instruction Set summary.

Microprocessors and Microcontrollers:

          Microprocessors and microcontrollers stem from the same basic idea, are made by the same people, and are sold to the same types of system designers and programmers. What is the difference between the two.

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