外文翻译电子密码锁的设计.doc

外文文献译文 设计(论文)题目: 电子密码锁的设计 专业与班级: 学生姓名: 指导教师: Introduction of AT89C51 Description: The AT89C51 is a low-power, high-performance CMOS 8-bit microcomputer with 4K bytes of Flash programmable and erasable read only memory (PEROM). The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51 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 Flash on a monolithic chip, the ATMEL Co.’s AT89C51 is a powerful microcomputer which provides a highly-flexible and cost-effective solution to many embedded control applications. Features: ·Compatible with instruction set of MCS-51 products ·4K bytes of in-system reprogrammable Flash memory ·Endurance: 1000 write/erase cycles ·Data retention time: 10 years ·Fully static operation: 0 Hz to 24 MHz ·Three-level program memory lock ·128×8-bit internal RAM ·32 programmable I/O lines ·Two 16-bit Timer/Counters ·Six interrupt source ·Programmable serial channel ·Low-power idle and Power-down modes ·On-chip oscillator and clock circuitry ·Full-duplex UART serial port interrupt line ·Dual Data Pointer Register Function Characteristic Description: The AT89C51 provides the following standard features: 4K bytes of Flash memory, 128 bytes of RAM, 32 I/O lines, 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 AT89C51 is designed with static logic for operation down to zero frequency and supports two software selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters, serial port and interrupt system to continue functioning. The Power-down Mode saves the RAM contents