Memory on-die termination (ODT) setting:设置存储器 ODT 的值。 Memory CAS latency setting:设置从读命令到从存储器中输出第 1 个数据之间的延时时钟周期数。 Memory Additive CAS latency setting:附加 CAS 延迟设置。 ③ Memory Timing Parameters Memory initialization time at power- -up (tINIT):最小存储...
Now we can study the detailed definition of various timing parameters. CAS Latency (CL): CAS Latency (Column Access Strobe Latency), also known as "Access Time," is the most important memory parameter and is the first of the series of numbers. It is the delay time between the moment a ...
交互时序 //Interconnect timing 时序参数 //Timing parameters 频率比 // Frequency ratio 功能// Function 信号位宽自不必说,MC 和 PHY 有效信号的位宽必须相等,对于一些位宽不匹配的信号,需要确保对功能不会有影响。 交互时序指的 MC 和 PHY 之间发送信号的时序,和接收信号时的 setup 和 hold 时序需求。 第一...
DLL sharing mode,OCT sharing mode同上。 (2)Memory Parameters和Memory Timing 对于Memory Parameters和Memory Timing,当在IP核配置页面左方library中,选定DDR型号(如本文MICRON MT41K256M16HA),点击Apply,即实现具体DDR器件和参数匹配,无需再设置,如下图。 (3)Board Settings Board Settings:Use Altera’s default...
The MPC5200B datasheet specifies the DDR SDRAM read timing parameters for data setup and hold relative to MDQS but shows data setup as a max parameter? The SpecID is A5.18. Can someone explain what is meant by maximum setup time allowed? Also the data hold time ...
1.1.2 Summary of Timing Parameters Table 1‑1 Summary of timing parameters used in a generic DRAM-access protocol Table 1‑1总结了用于检验基本DRAM访问协议的基本时序参数。Table 1‑1中汇总的时序参数与用于描述每个现代DRAM存储器访问协议的完整时序参数集相距甚远。但是,Table 1‑1中描述的有限时序...
在write leveling模式下,仅RTT_nom可用。在写模式下,可以使能RTT_wr来动态改变ODT而不需要重新设置MR寄存器。RTT_nom和RTT_wr间的切换和时序要求参见DDR3标准的5.3 dynamic ODT 一节,以及该节的Table 16 — Latencies and timing parameters relevant for Dynamic ODT。
https://www.systemverilog.io/design/ddr4-timing-parameters-cheatsheet/ ACTIVATE时序 ACTIVATE命令用于在BANK中打开一行。 ● 如果BANK属于同一个BANK组,它们的activate必须用tRRD_L分隔(row-to-row delay--long) ● 如果BANK属于不同的BANK组,它们的activate必须用tRRD_S分隔(row-to-row delay--short) ...
In the past, we used a version with DDR2 memory. Our products have a flexible BoM to avoid disruptions in the manufacturing chain, so we tested some different PNs of DDR2. Since each one has few changes in AC timing parameters I did this post (link) to check if were possible to ...
本文为翻译学习大佬文章。强烈推荐感兴趣的同学阅读原文DDR4 SDRAM - Understanding Timing Parameters 简介 DDR 标准中有大量的时序参数,但是当您使用 DDR4 SDRAM 时,您经常会发现自己比其他人更频繁地重新访问或阅读少数时序参数。因此,在本文中,我们将通过在命令上下文中查看这些频繁出现的时序参数来检查它们。