计时器

Given multi-clock domain systems integrated in the single chip,the number of asynchronous greatly increased, the metastability has increasingly important effects on the reliability of the PLDs.

在用P L D实现同步数字系统设计时，如果所有模块共用同一个时钟信号，系统中所有的寄存器都由该时钟的边沿来触发，这样的时钟设计·2006第02期·ELECTRONICS QUALITY可以使整个设计流程易于处理，顺利实现综合、布局布线到静态时序分析。

Put a quarter in the parking meter. I don't want to get a ticket.

放个25美分硬币到计时收费器里，我不想吃罚单。

Image: Magee's parking meter - the first in the world

图片：麦基的停车计时收费器——世界上的第一个

A method form obtaining IP address of maintenance channel includes judging whether ATM address is included in preconfigured IPOA PVC data of base station controller or not by BSC according to ATM address in BOOTP request message, returning BOOTP response message back to base station if it is or otherwise returning failure message back to BOOTP, carrying out judgment on each parameter in BOOTP response message by BS as per preset parameter rule, utilizing all parameters to set up IPOA channel when all parameters are consistency with said rule and required transmission bandwidth of IPOA channel is less than bandwidth limitation of maximum transmission.

本发明提供一种维护通道IP地址的获取方法以及修改方法，包括：在基站控制器侧预先配置基站的维护通道IPOA PVC数据，该IPOA PVC数据包括该基站的ATM地址；该基站在专用的PVC上发送BOOTP请求消息，该BOOTP请求消息中包括该基站的ATM地址，并且同时启动超时定时器对第一时间间隔计时；基站控制器根据该BOOTP请求消息中的ATM地址，判断基站控制器中预先配置的IPOA PVC数据中是否包括该ATM地址，若包括，则向该基站返回BOOTP响应消息，该BOOTP响应消息包括关于维护通道IP地址的参数，否则返回BOOTP失败消息；基站根据预定参数规则，对该BOOTP响应消息中的每一参数进行判断，在所有参数符合预定参数规则、且建立该IPOA通道所需传输带宽小于最大传输带宽限制的情况下，利用该所有参数建立IPOA通道。

In sample and hold circuit and Multiplying DAC, a gain-boosting op amp was used to insure the speed and precision of the Switch-capacitor circuit.

在比较器设计时，采用了前置放大器加动态锁存器的结构，达到了较快的速度，并减小了回程脉冲效应。

The general timing counter applied in computer includes configuration register TCCFG control word register TCCON, state register TCSTA, initial value register TCPAL and internal counter TCCOUNTER. Both the said internal counter TCCOUNTER and the internal bus are in 32 bit width and the 32 bit read-out bus and 32 bit write-in bus are connected directly to the 32 bit internal bus. Therefore, the present invention has the advantages of long counting time, high precision and simple chip design and programming.

本发明公开了一种应用于计算机领域中的通用计时计数器，包括配置寄存器TCCFG、控制字寄存器TCCON、状态寄存器TCSTA、初值寄存器TCPVAL和内部计数器TCCOUNTER；所述的内部计数器TCCOUNTER和内部总线都是32位宽度，其32位的写入总线和读出总线都直接连到32位的内部总线上；从而克服了现有技术中计数时间短、编程和芯片设计复杂、计数精度低的缺点，使得计数时间长、精度高、芯片设计和编程简单。

What s even creepier is that it houses two displays insides its glass tummy that animates ever so often changing between being a chronometer, magnifying glass, mirror, compass, news box, phone, media player, and TV which frankly looks a little funny considering all the action takes place with a mysterious dark background that tends to steal all the focus away from the screen itself!

更加神奇的是，它的两个显示屏都隐藏在玻璃表面之下。那些玻璃经常能发挥不同的功能，比如计时计、放大镜、镜子、指南针、消息盒、手机、媒体播放器、以及一个电视。一想到所有的情节都在一个神奇的黑色背景下播放，而这个背景本身又将通过其屏幕，吸引所有的注意力，就觉得这看起来是一件十分好笑的事情。

The invention comprises the following steps: the user of the mobile communication terminal setting the power save mode, selecting the subdistrict search time and opening the holding period of the power source, judging and counting the exceeding time that the subdistrict power falling under the reference value according to the saved subdistrict search time, operating the power save mode, closing the working power source supplied by the battery and driving the timer with the minimum working power source if exceeding the saved subdistrict search time; opening the working power source, searching the subdistrict and maintaining the calling standby state if the overtiming.

包括步骤：移动通信终端的用户设置节电模式，选择小区搜索次数和打开电源的保存时间，以保存的小区搜索次数为根据，判断计数小区功率降到基准值以下的超过次数，如果超过上述保存的小区搜索次数，则运行节电模式，关闭电池供应的工作电源，以最小工作电源驱动定时器计时；比较判断结果是时间已超过时，打开工作电源，搜索小区，同时保持通话待机状态。

Claim tokening can result from expired timers, or from any other condition that causes any station to suspect a problem with the current active monitor.

定时器计时结束将激活情求令牌，其他一些状况比如任意工作站猜测当前激活监控器出现故障时也可以激活情求令牌。

Heating time for all nichrome wires was controlled by a microprocessor-based timer/controller.

加热时间利用微处理计时器精确控制。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。