2.7-Volt, 80C31 Microcontroller with 2K Bytes In-System Programmable Flash, 20-pin Package.

• 2K version: AT89S2051
• 4K version: AT89S4051

AT89S2051 概述

The AT89S2051/S4051 is a low-voltage, high-performance CMOS 8-bit microcontroller with 2K/4K bytes of In-System Programmable (ISP) Flash program memory. The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51 instruction set. By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89S2051/S4051 is a powerful microcontroller which provides a highly-flexible and cost-effective solution to many embedded control applications. Moreover, the AT89S2051/S4051 is designed to be function compatible with the AT89C2051/C4051 devices, respectively.

The AT89S2051/S4051 provides the following standard features: 2K/4K bytes of Flash, 256 bytes of RAM, 15 I/O lines, two 16-bit timer/counters, a six-vector, fourlevel interrupt architecture, a full duplex enhanced serial port, a precision analog comparator, on-chip and clock circuitry. Hardware support for PWM with 8-bit resolution and 8-bit prescaler is available by reconfiguring the two on-chip timer/counters. In addition, the AT89S2051/S4051 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 but freezes the disabling all other chip functions until the next external interrupt or hardware reset.

The on-board Flash program memory is accessible through the ISP serial interface. Holding RST active forces the device into a serial programming interface and allows the program memory to be written to or read from, unless one or more lock bits have been activated.

AT89S2051 特性

• Compatible with MCS®51 Products
• 2K/4K Bytes of In-System Programmable (ISP) Flash Program Memory
  – Serial Interface for Program Downloading
  – Endurance: 10,000 Write/Erase Cycles
• 2.7V to 5.5V Operating Range
• Fully Static Operation: 0 Hz to 24 MHz (x1 and x2 Modes)
• Two-level Program Memory Lock
• 256 x 8-bit Internal RAM
• 15 Programmable I/O Lines
• Two 16-bit Timer/Counters
• Six Interrupt Sources
• Programmable Serial UART Channel
• Direct LED Drive Outputs
• On-chip Analog Comparator with Selectable Interrupt
• 8-bit PWM (Pulse-width Modulation)
• Low Power Idle and Power-down Modes
• Brownout Reset
• Enhanced UART Serial Port with Framing Error Detection and Automatic
  Address Recognition
• Internal Power-on Reset
• Interrupt Recovery from Power-down Mode
• Programmable and Fuseable x2 Clock Option
• Four-level Enhanced Interrupt Controller
• Power-off Flag
• Flexible Programming (Byte and Page Modes)
  – Page Mode: 32 Bytes/Page
• User Serviceable Signature Page (32 Bytes)

AT89S2051 订购型号

深圳市广辉电子有限公司是国内实力的电子元器件代理分销商和现货库存供应商之一。 广辉电子代理经销的产品有：IC集成电路、继电器、传感器、贴片电容、贴片电阻、贴片电感、贴片磁珠、贴片二、三极管、集成电路。代理经销的品牌有: TDK、MURATA 、PANASONIC、TAIYO、NICHICON、NEC、YAGEO、WALSIN、RALEC、AVX、KEMET、SPRAGUE、PARTSNIC、Intel、Motorola、Sharp、Sony、Samsung、 Sanyo、 Siemens、Maxim、Harris、Hyundai、National、Fairchild、Philips、Toshiba、Catalyst、 Winbond. 我司供应贴片与插件钽质电容，贴片电容；同时在偏冷门、军工、停产、紧缺料、断档、急料类电子元器件也具备相当优势！除有大量现货库存外，我们还与国内外数千家OEM、EMS厂家及现货商联网，可将库存直接呈现在您的眼前！从定单到交货，最快可在48 小时内将急需的货物送到您的手中，从而可以使您早日将产品推出市场，抢占先机！！ 本公司一惯坚持：“品质、价格合理、交货快捷、服务至上”的发展理念，始终将“诚信、认真、执着、乐观”的精神作为企业发展的宗旨，通过强大的市场服务网络体系向客户提供规范化、化、多元化、全方位的优质服务。真诚欢迎海内外客户前来洽谈合作，共谋发展和建立长期的合作关系！同时也希望能与电子界的同行进行广泛的交流合作，共同为业界的繁荣发展作出应有的贡献！