at89s52内部有上拉电阻吗?

盗连可耻2022-10-04 11:39:541条回答

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lolay51 共回答了21个问题 | 采纳率95.2%
AT89S52是一种低功耗、高性能CMOS8位微控制器,具有8K 在系统可编程Flash 存储器
低功耗 也能理解为消耗了能 所以有
1年前

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英语翻译本系统采用AT89S52为控制CPU,实现玩具小车的智能控制.整个智能小车智能控制模块包括:前轮PWM驱动电路、
英语翻译
本系统采用AT89S52为控制CPU,实现玩具小车的智能控制.整个智能小车智能控制模块包括:前轮PWM驱动电路、后轮PWM驱动电路、轨迹探测模块、障碍物探测模块、金属探测模块、速度测量模块、数码管显示模块等.前轮和后轮驱动电路是采用BA6219控制芯片控制小车的运行.轨迹探测模块才用反射式红外接收头能够对黑线轨迹进行检测,障碍物探测模块采用红外接近开关对障碍物进行测量,金属探测模块采用电感式接近开关检测金属模块,速度测量模块采用对射式光电开关对小车的速度进行实时测量,显示模块主要对小车读运行速度和行程等参数进行显示.单片机对各个信号进行分析和处理对小车进行实时控制使小车能够跟踪黑线通过障碍物,并跟踪黑线路返回到起始位置.
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This system uses AT89S52 controls CPU,realizes the toy carintelligent control.The entire intelligent car intelligence controlmodule includes:Front wheel PWM actuation electric circuit,trailingwheel PWM actuation electric circuit,path survey module,obstaclesurvey module,metal survey module,velocity measurement module,digital tube demonstration module and so on.The front wheel and therear wheel drive electric circuit is uses the BA6219 control chip tocontrol the car the movement.The path survey module only then usesthe reflection type infrared to meet can carry on theexamination to the heavy line path,the obstacle survey module usesinfrared approaches the switch to carry on the survey to the obstacle,the metal survey module uses the inductance type to approach theswitch examination metal module,the velocity measurement module usesthe correlation type photoelectricity switch to carry on the real-timemeasurement to the car speed,demonstrated the module mainly readsparameter and so on running rate and travelling schedule to the carcarries on the demonstration.The monolithic integrated circuitcarries on to each signal analyzes and processes to the car carries onthe real-time control to enable the car to track the heavy line thepassing obstacles,and tracks the black line to return to thereference.
英语翻译英文摘要本文所设计的恒温控制监测系统主要是用AT89S52单片机控制一个电烤箱.电烤箱由1KW电炉加热,最高温度
英语翻译
英文摘要
本文所设计的恒温控制监测系统主要是用AT89S52单片机控制一个电烤箱.电烤箱由1KW电炉加热,最高温度为120℃;电烤箱温度可设置,电烤过程恒温控制,温度控制误差≤±2℃;实时显示温度和设置温度,显示温度为1℃;温度超过±5℃时发超限报警.
关键词:恒温控制系统;单片机;AT89S52;
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The design of the constant temperature control monitoring system is mainly used AT89S52 control of an electric oven.Electric oven is composed of 1KW furnace heating,the highest temperature is 120 DEG C; electric oven temperature settings,roasting process temperature control,temperature control error of + / - 2 DEG C; real time display of temperature and the set temperature,display the temperature of 1 DEG C; temperature more than 5 DEG C.when the overrun alarm.
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英语翻译
本系统设计了一个基于AT89S52单片机控制的语音播报数字多用表.它是一种价格便宜和操作简单、自动显示和播报测量数据结果、体积更小、功能强大、便于携带的语音播报数字多用表.要求能够准确测量一定范围内的电阻、电容、电感、电流及电压各参数,可以在LED上显示出来且同时通过显示和语音播报的方式将测量结果告诉用户,从而减小了因视觉误差而带来的读数误差,进一步提高了仪表的测量精确度,具有一定的智能性.系统原理是通过将测量参数R、L、C、I、V等经过频率转换电路,将对应的参数值转换成相应的频率,再通过AT89S52单片机的T0口对此频率进行采样计数,经过单片机内部处理后将频率恢复成实际数据值,在LED数码显示管上显示,并通过ISD1420语音芯片播报出来.通常的仪表测量是通过谐振法、电桥法或是伏安法来测量数据,在测量时误差比较大,而本设计采用将预测参数转换成相应频率后再处理、恢复出数据,测量误差比较小,从而提高了仪表的精确度.
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AT89S52 单片机 数据手册 第23页 最下面注释 IOL=per port pin:10mA 与per 8-bit
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以P1为例,前者是P1.P1.7每个IO口,后者是P1口