In this chapter, we will learn about some external and internal features of
MCS-51 microcontroller. After completion of the chapter, the reader should be
able to
•Name major external signals and their types.
•Identify minimum input to make the system working.
•Understand alternate functions of some pins.
•Explain basic internal architecture of MCS-51.
•Know details of program memory and data memory.
•Understand registers, system clock characteristics and reset circuit.
2.1 | External Features
As mentioned in the previous chapter, MCS-51 core is available in many variations. For easier discussions, we
select a standard ...
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