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MCS-51单片机作为一种通用单片机,其结构和原理对所有单片机都适用,因此,MCS-51单片机不但广泛应用于产品开发,而且在教学上更是占有主导地位。但许多单片机爱好者在开始学习单片机系统开发时,对其硬件结构很难入手,特别遇到如:P3口的双功能、存储器地址冲突等问题,更是棘手。由于MCS-51单片机的硬件资源很有限,所以在进行系统开发时,对硬件的使用必须“苛刻”。因此,在学习单片机时,一定要对其硬件结构非常清楚,才能充分利用,以便更好地进
MCS-51 single-chip microcomputer as a general-purpose microcontroller, the structure and principles of all single-chip microcomputer are applicable, therefore, MCS-51 single-chip microcomputer is not only widely used in product development, but also in teaching is more dominant. However, many microcontroller enthusiasts began to learn microcontroller system development, its hardware structure is difficult to start, in particular, such as: P3 dual-function, memory address conflicts and other issues, but also tricky. As the MCS-51 microcontroller hardware resources are limited, so the system development, the use of the hardware must be “harsh ”. Therefore, when learning SCM, we must make its hardware structure is very clear, in order to make full use of, in order to better