首页> 外国专利> For an output circuit with a double data rate operating dynamic random access memory (ddr dram), a with double data rate of operating a dynamic random access memory (ddr dram), a method for the clocked reading of data from at twice the data rate operating dynamic random access memory (ddr dram) and a method for providing a data - strobe - signal

For an output circuit with a double data rate operating dynamic random access memory (ddr dram), a with double data rate of operating a dynamic random access memory (ddr dram), a method for the clocked reading of data from at twice the data rate operating dynamic random access memory (ddr dram) and a method for providing a data - strobe - signal

机译：对于具有双倍数据速率运行动态随机存取存储器（ddr dram）的输出电路，具有双倍数据速率运行动态随机存取存储器（ddr dram）的输出电路，该方法用于从时钟中以两倍数据速率读取数据操作动态随机存取存储器（ddr dram）和提供数据选通信号的方法

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摘要

A method and apparatus for synchronizing output data and data strobe signals uses internal interleaved clock signals in a double data rate (DDR) DRAM that are synchronized with an external clock. A delay-locked loop internal to the DDR DRAM is locked to an external clock signal and generates the internal interleaved clock signals. The internal interleaved clock signals are delay matched with the external clock signal as they propagate through timing circuitry coupled to latency and burst length selection signals. A data strobe signal is generated using clock signals from the delay-locked loop and is synchronized with the internal interleaved clock signals. The data strobe signal and the data are coupled via paths having comparable numbers and types of delay elements to provide output data and data strobe signals having predetermined delay relationships with the external clock signal.

机译：一种用于同步输出数据和数据选通信号的方法和装置，其使用与外部时钟同步的双倍数据速率（DDR）DRAM中的内部交错时钟信号。 DDR DRAM内部的延迟锁定环路被锁定到外部时钟信号，并生成内部交错时钟信号。当内部交错的时钟信号通过耦合到等待时间和突发长度选择信号的定时电路传播时，它们与外部时钟信号延迟匹配。使用来自延迟锁定环路的时钟信号生成数据选通信号，并将其与内部交错的时钟信号同步。数据选通信号和数据经由具有可比较数量和类型的延迟元件的路径耦合，以提供与外部时钟信号具有预定延迟关系的输出数据和数据选通信号。

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公开/公告号DE10084993T1

专利类型
公开/公告日2002-08-01

原文格式PDF
申请/专利权人 MICRON TECHNOLOGY INC.;
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申请/专利号DE2000184993T
发明设计人 LI WEN;
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申请日2000-08-31
分类号G11C7/10;
国家 DE
入库时间 2022-08-22 00:27:11

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