单片机外文翻译-----at89s51概述.doc

1 General Description
The AT89S51 is a low-power, high-performance CMOS 8-bit microcontroller with 4K bytes of In-System Programmable Flash memory. The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard 80C51 instruction set and pinout. The on-chip Flash allows the program memory to be reprogrammed in-system or by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with In-System Programmable Flash on a monolithic chip, the Atmel AT89S51 is a powerful microcontroller which provides a highly-flexible and cost-effective solution to many embedded control applications.
The AT89S51 provides the following standard features: 4K bytes of Flash, 128 bytes of RAM, 32 I/O lines, Watchdog timer, two data pointers, two 16-bit timer/counters, a five-vector two-level interrupt architecture, a full duplex serial port, on-chip oscillator, and clock circuitry. In addition, the AT89S51 is designed with static logic for operation down to zero frequency and supports two software selectable power saving modes.
该AT89S51是一个低功耗，高性能CMOS 8位微控制器,可在4K字节的系统内编程的闪存存储器。该设备是采用Atmel的高密度、非易失性存储器技术和符合工业标准的80C51指令集和引脚。芯片上的Flash程序存储器在系统中可重新编程或常规非易失性内存编程 。通过结合通用8位中央处理器的系统内可编程闪存的单芯片， AT89S51是一个功能强大的微控制器提供了高度灵活的和具有成本效益的解决办法，可在许多嵌入式控制中应用。
在AT89S51提供以下标准功能： 4K字节的Flash闪存 ， 128字节的RAM ， 32个 I / O线，看门狗定时器，两个数据指针，两个16位定时器/计数器， 5向量两级中断结构，全双工串行端口，片上振荡器和时钟电路。此外， AT89S51设计了可降至零频率的静态逻辑操作和支持两种软件可选的节电工作模式。