【導(dǎo)讀】采用這顆芯片能大大簡(jiǎn)化仿真器的設(shè)計(jì)，因此國(guó)內(nèi)仿真器的水準(zhǔn)有了。大的提高，基本上可以不占用用戶資源。步，一直采用這種制作模式。例如HOOKS技術(shù)，但是由于本身技術(shù)的限制沒(méi)有成功。相反國(guó)外的仿真器較早。幾家主要的生產(chǎn)廠商還陶醉于Bondout技術(shù)之中。仿真芯片W78958的停產(chǎn)。制作仿真器以便更好的推廣W78958。但是經(jīng)過(guò)幾年的變化，W78958演變成為。W78958停產(chǎn)以后，國(guó)內(nèi)仿真器廠商處于一個(gè)非常尷尬的局面。支持特別是維修方面。另外，國(guó)內(nèi)圍繞在W78958上所做的技術(shù)工作也無(wú)法得到。延續(xù)和提高，很多業(yè)界人士認(rèn)為仿真器行業(yè)將面臨另起爐灶或重新洗牌的局面。專家們認(rèn)為仿真器廠家的整體轉(zhuǎn)型可能需要2－3年的周期，并且有相當(dāng)?shù)?。仿真器廠家將會(huì)被淘汰，市場(chǎng)擁有量將主要集中在少數(shù)幾個(gè)仿真器廠家。以根據(jù)用戶的要求量身定做，制造出具有自己特色的單片機(jī)芯片。C167CS-32FM，81C90；Motorola公司的68HC08AZ系列等。種建立在系統(tǒng)級(jí)芯片概念上的結(jié)構(gòu)。這種單片機(jī)由三個(gè)核

　　

【正文】 der to singlechip microputer as the core of embedded systems and Inter connected panies, there are many more studies in this area. More typical in this regard have emWare and TASKING pany. Embedded systems panies EmWare work program EMIT technology. This technology 外文翻譯 consists of three main parts: the emMicro, emGateway and web browser. Which, emMicro embedded devices is a 1Kbyte memory capacity accounted for only a very small web servers。 emGateway stronger as a function of the user or server, and it is used to achieve more than the management of embedded devices, as well as standard access the Inter munications, as well as the support of a web browser. Web browsers use to display and embedded emObjicts data transmission between devices. If sufficient resources embedded devices, while at the same time emMicro and emGateway into embedded devices, to achieve direct access to the Inter . Otherwise, it will require a web browser emGateway and each other. EmWare39。s EMIT software technology using standard Inter protocol for 8bit and 16bit embedded devices to manage, but costs much less traditional. At present, singlechip applications, a new problem: This is how to make the 8bit, 16bit singlechip microputer to control the product, or embedded products or equipment to achieve the interconnection and the Inter? TASKING is now to solve this problem means. The pany has emWare of EMIT software packages and related supporting integration, the formation of an integrated development environment, to provide users with convenient development. Embedded Inter Union ETI (embed the Inter Consortium) is to work closely with the development of embedded Inter solutions. Results in the near future there will be published. Fifth, technology development of the reliability of singlechip application In singlechip applications, reliability is the primary factor in the application of SCM in order to expand the scope and areas to improve the reliability of its singlechip is an effective method. In recent years, manufacturers of singlechip singlechip design in the use of a variety of new technologies to improve reliability, the performance of these new technologies in the following points: 1, EFT (Ellectrical Fast Transient) technology 2, EFT is an antijamming technology, which is defined as the sinusoidal signal oscillation circuit outside interference, the waveform will be a variety of Deburring signal superposition, if you use their plastic Schmidt circuit, it will bee a burr trigger signals interfere with the normal clock, in the alternate use of Schmitt circuit and RC filter circuit, it can be eliminated or their role in these gross failure to ensure that the clock signal systems work properly. In this way, a single chip to enhance the reliability of the work. Motorola39。s MC68HC08 family of single chip on the use of this 外文翻譯 technology. Lownoise cabling technology and drive technology In a traditional singlechip, the power and ground wire in the integrated circuit pin symmetric shell, the general is in the upper left, lower right or upper right, lower left of the two pairs of symmetric points. In this way, so that power supply noise on the chip through the block of singlechip interference caused by the internal circuit. Now, put a lot of singlechip power pin arrangement and the two adjacent pins. In this way, not only reduces the current through the entire chip, while still easy to layout printed circuit board decoupling capacitor, thus reducing system noise. Now in order to meet the needs of a wide range of applications, many singlechip output capacity has been greatly improved, Motorola39。s singlechip I / O port of the irrigation of up to 8mA current pull over, and Microchip39。s singlechip can be up to 25mA. Other panies: AMD, Fujitsu, NEC, Infineon, Hitachi, Ateml, Tosbiba basically been able to achieve, such as the level of 8 ~ 20mA. These large current drive circuit chip integrated into the work of bringing in all kinds of noise, in order to reduce this impact, and now the use of a number of small singlechip parallel tube equivalent ways of a large pipe, and in each small Guanzi different output equivalent series resistance of the resistor in order to reduce the di / dt, which is the socalled hopping along the softening technology, in order to eliminate transient current noise. 3, the use of lowfrequency clock Highfrequency noise sources outside the clock is one, not only can interfere with singlechip applications, but also interfere with the outside circuit, so that can not meet the requirements of electromagic patibility. Requirements for high reliability systems, lowfrequency external clock to reduce system noise. Singlechip used in a number of internal phase lock loop technology, in the external clock is low, it can produce a higher speed internal bus, thus ensuring the speed and reduce noise. Motorola39。s MC68HC08 family of 1 6 / 32bit singlechip has been adopted to improve the reliability of this technology