| The single-chip microcomputer was born in the late 1970s and has gone through three major stages: SCM, MCU, and SoC. 1. The SCM (Single Chip Microcomputer) stage mainly seeks the best architecture for the best single-chip embedded system. The success of the "innovation model" has laid a completely different development path for SCM and general-purpose computers. Intel has made an indelible contribution to the independent development of embedded systems. 2. MCU (Micro Controller Unit) stage, the main direction of technology development is: to continuously expand the various peripheral circuits and interface circuits required by the target system when meeting embedded applications, and highlight the intelligent control capabilities of the target. The fields it involves are all related to the target system, so the responsibility of developing MCU inevitably falls on electrical and electronic technology manufacturers. From this perspective, Intel's gradual withdrawal from the development of MCU also has its objective factors. In terms of developing MCU, the most famous manufacturer is Philips. Philips, with its great advantages in embedded applications, quickly developed MCS-51 from a single-chip microcomputer to a microcontroller. Therefore, when we review the development of embedded systems, we should not forget the historical achievements of Intel and Philips. 3. Single-chip microcomputer is the independent development path of embedded system. The important factor of development to MCU stage is to seek the maximum solution of application system on chip; therefore, the development of special single-chip microcomputer naturally forms the trend of SoC. With the development of microelectronic technology, IC design and EDA tools, the design of single-chip microcomputer application system based on SoC will have great development. Therefore, the understanding of single-chip microcomputer can be extended from single-chip microcomputer and single-chip microcontroller to single-chip application system. |