推荐回答(4个)
MCU按其存储器类型可分为无片内ROM型和带片内ROM型两种。对于无片内ROM型的芯片,必须外接EPROM才能应用(典型芯片为8031)。带片内ROM型的芯片又分为片内EPROM型(典型芯片为87C51)、MASK片内掩模ROM型(典型芯片为8051)、片内FLASH型(典型芯片为89C51)等类型,一些公司还推出带有片内一次性可编程ROM(One Time Programming, OTP)的芯片(典型芯片为97C51)。MASKROM的MCU价格便宜,但程序在出厂时已经固化,适合程序固定不变的应用场合;FALSHROM的MCU程序可以反复擦写,灵活性很强,但价格较高,适合对价格不敏感的应用场合或做开发用途;OTPROM的MCU价格介于前两者之间,同时又拥有一次性可编程能力,适合既要求一定灵活性,又要求低成本的应用场合,尤其是功能不断翻新、需要迅速量产的电子产品。 微控制器在经过这几年不断地研究,发展,历经4位,8位,到现在的16位及32位,甚至64位。产品的成熟度,以及投入厂商之多,应用范围之广,真可谓之空前。目前在国外大厂因开发较早,产品线广,所以技术领先,而本土厂商则以多功能为产品导向取胜。但不可讳言的,本土厂商的价格战是对外商造成威胁的关键因素。 由于制程的改进,8位MCU与4位MCU价差相去无几,8位已渐成为市场主流;目前4位MCU大部份应用在计算器、车用仪表、车用防盗装置、呼叫器、无线电话、CD播放器、LCD驱动控制器、LCD游戏机、儿童玩具、磅秤、充电器、胎压计、温湿度计、遥控器及傻瓜相机等;8位MCU大部份应用在电表、马达控制器、电动玩具机、变频式冷气机、呼叫器、传真机、来电辨识器(CallerID)、电话录音机、CRT显示器、键盘及USB等;16位MCU大部份应用在行动电话、数字相机及摄录放影机等;32位MCU大部份应用在Modem、GPS、PDA、HPC、STB、Hub、Bridge、Router、工作站、ISDN电话、激光打印机与彩色传真机;64位MCU大部份应用在高阶工作站、多媒体互动系统、高级电视游乐器(如SEGA的Dreamcast及Nintendo的GameBoy)及高级终端机等。
多点处理单元(MCU)
MCU是视频会议系统的核心部分,为用户提供群组会议、多组会议的连接服务。目前主流厂商的MCU一般可以提供单机多达32个用户的接入服务,并且可以进行级联,可以基本满足用户的使用要求。MCU的使用和管理不应该太复杂,要使客户方技术部甚至行政部的一般员工能够操作。
1、微控制单元(Microcontroller Unit;MCU) ,又称单片微型计算机(Single Chip Microcomputer )或者单片机,是把中央处理器(Central Process Unit;CPU)的频率与规格做适当缩减,并将内存(memory)、计数器(Timer)、USB、A/D转换、UART、PLC、DMA等周边接口,甚至LCD驱动电路都整合在单一芯片上,形成芯片级的计算机,为不同的应用场合做不同组合控制。
2、MoneyWise Credit Union(MCU)是一家经英国政府批准成立的专业从事资产管理服务公司,同时是全球金融衍生品交易服务的提供商。MCU 受英国金融服务管理局(FSA)授权和监管FSA:213486。MCU公司是主要从事英国及世界经济的研究、开发、咨询、指导、资产管理等方面实现全球经济一体化而成立的金融服务企业。
3、MCU实质上是一台多媒体信息交换机,进行多点呼叫和连接,实现视频广播、视频选择、音频混合、数据广播等功能,完成各终端信号的汇接与切换。MCU与现行交换机不同之处在于,交换机完成的是信号的点对点连接,而MCU则要完成多点对多点的切换、汇接或广播。
MCU,单品微型计算机,
现在市场上8051内核的估计是这几家比较火的:
C8051、台湾新唐、STC、PIC、AT
32位的ARM内核:
新唐的M0系列,ST32、NXP的32位M0、M1、M3系列
新唐这几年发展比较好
在BIOS设置中有关于是否更新微代码 Microcode Updation [Enabled] : Disabled/Enabled MCU(Micro Control Unit)中文名称为微控制单元,又称单片微型计算机(Single Chip Microcomputer)或者单片机,是指随着大规模集成电路的出现及其发展,将计算机的CPU、RAM、ROM、定时计数器和多种I/O接口集成在一片芯片上,形成芯片级的计算机,为不同的应用场合做不同组合控制
http://baike.baidu.com/view/100928.htm
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