芯人芯事----Intel的8051单片机，竟是SoC的鼻祖？

0、背景：Intel为什么要在8086大获成功之后还要开发8051单片机呢？

----问题：why did Intel still produce 8051 after its success on 8086 ?

----Intel continued producing the 8051 after the success of the 8086 because they served different purposes: the 8086 was a general-purpose microprocessor for PCs, while the 8051 was an integrated microcontroller ideal for control-oriented applications. The 8051's unique features, like its built-in RAM, ROM, and I/O, made it a distinct and highly successful product in its own right, leading to a large ecosystem of derivatives from Intel and other licensed manufacturers. 

----Different roles in the market

----8086: A general-purpose microprocessor designed to be the CPU for personal computers. It required external components like RAM, ROM, and I/O to function, making it suitable for a wide range of applications but more complex to build a complete system around.

----8051: A microcontroller that integr