4.1 单片机中断技术概述 4.2 AT89S52的中断系统结构 4.2.1 中断请求源 4.2.2 中断请求标志寄存器 4.3 中断允许与中断优先级的控制 4.3.1 中断允许寄存器IE 4.3.2 中断优先级寄存器IP 4.4 响应中断请求的条件 4.5 外部中断的响应时间 4.6 外部中断的触发方式选择 4.6.1 电平触发方式 4.6.2 跳沿触发方式 4.7 中断请求的撤销 4.8 中断服务子程序的应用设计 4.9 多外部中断源系统设计 4.9.1 定时器/计数器作为外部中断源的使用方法 4.9.2 中断和查询结合的方法 4.9.3 用优先权编码器扩展外部中断源

Lyndon Baines Johnson: \We Shall Overcome\ Mr. Speaker, Mr. President, Members of the Congress: I speak tonight for the dignity of man and the destiny of democracy. I urge every member of both parties, Americans of all religions and of all colors, f rom every section of this country, to join me in that cause. At times history and fate meet at a single time in a single place to shape a turning

Chancellor Kohl, Governing Mayor Diepgen, ladies and gentlemen: Twenty four years ago, President John F. Kennedy visited Berlin, and speaking to the people of this city and the world at the city hall. Well since then two other presidents have come, each in his turn to Berlin. And today, I, myself, make my second visit to your city

People and issues – Text (A) Text study Background information Words and expressions Text Looking at the text Working with words Listening Listening 1 Listening 2 Listening 3 Personal view – Text (B) Text study Background information Words and expressions Text Looking at the text Working with words Listening 4 Listening 5 Listening Speaking

colorful life, the looser environment, yet From primary school to college, stu the more creative minds of the future stu dents, teachers and parents -all are dents. Our education, so to spea struggling for high scores. This is because bring up a new generation the current education system is not aimed at students' quality, but only at develop- tests. As a result

• Chapter 1 At the Travel Agency • Chapter 2 Arrival • Chapter 3 At the Hotel • Chapter 4 Food and Drinks • Chapter 5 Transport

1. What is nuclear QCD? Why apply QCD to nucleonic and nuclear systems? 2. Bases of nuclear QCD: QCD and its properties 3. Nucleon and nuclei at high-energy scale 4. Nonperturbative QCD studies 5. Nucleon, nuclei at low-energy scale 6. Summery

11.1 单总线串行扩展 11.1.1 单总线系统的典型应用-DS18B20的温度测量系统 11.1.2 单总线DS18B20温度测量系统的设计 11.2 SPI总线串行扩展 11.3 I2C总线的串行扩展 11.3.1 I2C串行总线系统的基本结构 11.3.2 I2C总线的数据传送规定 11.3.3 AT89S52的I2C总线系统扩展 11.3.4 I2C总线数据传送的模拟 11.3.5 利用I2C总线扩展E2PROM AT24C02的IC卡设计

If you think participating in a programming contest is stressful, imagine being an air traffic controller. With human lives at stake, an air traffic controller has to focus on tasks while working under constantly changing conditions as well as dealing with unforeseen events. Consider the task of scheduling the airplanes that are landing at an airport. Incoming airplanes report their positions, directions, and speeds, and then the controller has to devise a landing schedule that brings all

This term’s teaching content covers 10 units. Basically, every two units will be finished within 3 weeks. Except the one￾week holidays of the National Day and the oral English test, there are 15 weeks left for teaching, so at least 9 unit should be finished at the end of this term. Roughly the teaching of one unit covers 6 periods