8.1 系统并行扩展结构 8.2 地址空间分配和外部地址锁存器 8.2.1 存储器地址空间分配 8.2.2 外部地址锁存器 8.3 静态数据存储器RAM的并行扩展 8.3.1 常用的静态RAM（SRAM）芯片 8.3.2 外扩数据存储器的读写操作时序 8.3.3 AT89S52单片机与RAM的接口设计与软件编程 8.4 片内Flash存储器的编程 8.4.1 使用通用编程器的程序写入 8.4.2 使用下载线的ISP编程 8.5 E2PROM的并行扩展 8.5.1 并行E2PROM芯片简介 8.5.2 E2PROM的工作方式 8.5.3 AT89S52单片机扩展E2PROM AT2864的设计

9.1 I/O接口扩展概述 9.1.1 扩展的I/O接口功能 9.1.2 I/O端口的编址 9.1.3 I/O数据的传送方式 9.1.4 I/O接口电路 9.2 AT89S52扩展I/O接口芯片82C55的设计 9.2.1 82C55芯片简介 9.2.2 工作方式选择控制字及端口PC置位/复位控制字 9.2.3 82C55的3种工作方式 9.2.4 单片机扩展82C55的接口设计 9.2.5 AT89S52扩展82C55的应用举例 9.3 利用74LSTTL电路扩展并行I/O口 9.4 用AT89S52单片机的串行口扩展并行口 9.4.1 用74LS165扩展并行输入口 9.4.2 用74LS164扩展并行输出口 9.5 用I/O口控制的声音报警接口 9.5.1 蜂鸣音报警接口 9.5.2 音乐报警接口

8.1 系统并行扩展结构 8.2 地址空间分配和外部地址锁存器 8.2.1 存储器地址空间分配 8.2.2 外部地址锁存器 8.3 静态数据存储器RAM的并行扩展 8.3.1 常用的静态RAM（SRAM）芯片 8.3.2 外扩数据存储器的读写操作时序 8.3.3 AT89S52单片机与RAM的接口设计与软件编程 8.4 片内Flash存储器的编程 8.4.1 使用通用编程器的程序写入 8.4.2 使用下载线的ISP编程 8.5 E2PROM的并行扩展 8.5.1 并行E2PROM芯片简介 8.5.2 E2PROM的工作方式 8.5.3 AT89S52单片机扩展E2PROM AT2864的设计

Air at high pressure, i.e. at 25 bar or more, is required for starting main and auxiliary engines in motorships. Air at low pressure, say at 6 bar or less is required for much remote or temperature or pressure controlled equipment, for which purpose it must be clean and oil-free

Suppose that two aerial routes--one Eastbound and one Northbound--cross at an altitude of 35,000 feet at junction(Figure 1). In the absence of air-traffic control, the times at which eastbound planes would arrive at the junction would reflect a Poisson process with parameter(per minute)

Abstract In Chapter Seven we continue to look at the variety of ways in which people in Britain today spend their leisure time. We especially look at excursions away from home for a short or longer break. But we first look at the transport infrastructure of Great Britain a network of airports, railway lines, motorways and other roads, which, together, connect up the even remotest parts of the country and help to make

Problem set 3 Solutions Due: Tuesday, February 22 at 9 PM Problem 1. An urn contains 75 white balls and 150 black balls. while there are at least 2 balls remaining in the urn, you repeat the following operation. You remove 2 balls elected arbitrarily and then: If at least one of the two balls is black, then you discard one black ball and put the other ball back in the urn

European Options on Stocks 13.2 Providing a dividend yield We get the same probability distribution for the stock price at time T in each of the following cases 1. The stock starts at price so and provides a dividend yield =q 2. The stock starts at price Soe q l and provides no income

In this problem we will study the effects of adding rules to the rule- base. Suppose that we use seven triangular membership functions on each universe of discourse and make them uniformly distributed in the same manner as how we did in Exercise 2.3. In particular make the points at which the outermost input membership functions for e saturate at +r/2 and for e at tr/4 For u make the outermost ones have their peaks

T细胞的抗原识别: 初始αBT细胞TCR与APC表面递呈的MHC-肽复合 物结合。 aT细胞识别抗原具有MHC限制性: CD4+aT细胞识别APC递呈的MHC1-肽复合物; D8+aT细胞识别APC递呈的MHC-肽复合物