说明：  AT89S52是一种低功耗、高性能CMOS8位微控制器，具有 8K 在系统可编程Flash 存储器。使用Atmel 公司高密度非 易失性存储器技术制造，与工业80C51 产品指令和引脚完 全兼容。片上Flash允许程序存储器在系统可编程，亦适于 常规编程器。在单芯片上，拥有灵巧的8 位CPU 和在系统 可编程Flash，使得AT89S52为众多嵌入式控制应用系统提 供高灵活、超有效的解决方案。
(AT89S52 is a low-power, high-performance CMOS8-bit microcontroller with 8K in-system programmable Flash memory. Using Atmel' s high density nonvolatile memory technology, and industrial products 80C51 instructions and is fully compatible pin. On-chip Flash program memory allows in-system programmable, but also for conventional programmer. In a single chip, has a smart 8-bit CPU and in-system programmable Flash, make AT89S52 for many embedded control applications, providing high flexibility, ultra-effective solution.)