SDRAM控制器无法存储

有许多不同的SDRAM芯片（单数据速率和双数据速率）。
也许如果你
向我们提供您的电路板上的芯片的部件号，有人可以提供解决方案。
对于大多数双倍数据速率设计，我建议使用MIG内核。
问候，
的Gabor
-  Gabor



以下为原文

There's a lot of different SDRAM chips (single and double data rate).  Maybe if you
give us the part number of the chip on your board someone can help with a solution.
 
For most double data rate designs, I would suggest using the MIG core.
 
Regards,
Gabor
-- Gabor

这是pc100模块P4M644YLDF6-100CL3A上的标记，它是来自spectek（http://www.spectek.com/pdfs/4M644YL.PDF）的32MB sdram。您可以从他们的站点获取数据表。文档名称为P4M644YL。
但芯片上的标记和部件号为525LKT-8A，我找不到芯片的数据表。
提前致谢。
我喜欢Digital和参与其中的你！



以下为原文

This is the markings on pc100 module   P4M644YLDF6-100CL3A  it's a 32MB sdram from spectek (http://www.spectek.com/pdfs/4M644YL.PDF) . You can get the datasheet from their site.the document name is P4M644YL. but on chip marking and part numbers is 525LKT-8A i could not find a datasheet for the chips.
 
thanks inadvance.
I love Digital
and you who involved in it!

模块上的芯片很可能是经过特殊标记而不是
对应于制造商的部件号。
然而，它很容易
根据模块的描述弄清楚这些芯片是什么。
然后，您可以查看Micron等效部件的数据表
看看它怎么运作。
首先，这是一个单个数据速率部分，16位宽，54引脚
TSOP（我假设），4M x 16位。
速度等级可能会好一点
比模块速度等级，但如果你不想推
信封你可以以模块的速度运行它。
-8A
市场营销似乎表明125 MHz的部分，模块会 
在额外加载DIMM后以100 MHz运行以进行计时。
看看美光网站，我只能找到更快的部件
相同的密度和其他特性，但你可以看看
在这些数据表中了解零件的工作原理
只是意识到你的部分是慢的，所以它不会满足
来自Micron数据表的时序。
这是代表性的Micron部件号：
MT48LC4M16A2TG-75
您可以查看可用于FPGA的MIG内核，看看是否可以
支持这个或类似的部分。
然后在a运行核心
时钟速率比自定义时指定的速率慢
这样你就更有可能与你合作。
问候，
的Gabor
-  Gabor



以下为原文

It's likely that the chips on a module have been specially marked and won't
correspond to a manufacturers part number.  However it's pretty easy to
figure out what these chips are based on the description of the module.
Then you can look at the datasheet for the Micron equivalent part to
see how it works.
 
To start with this is a single data rate part, 16 bits wide, in a 54-pin
TSOP (I assume), 4M x 16 bits.  The speed grade is likely to be a little better 
than the module speed grade, but if you don't want to push the
envelope you can run it at the speed of the module.  The -8A
markeing seems to indicate a 125 MHz part, and the module would
run at 100 MHz to make timing after the extra loading of the DIMM.
 
Looking at the Micron site, I can only find faster parts that have
the same density and other characteristics, but you can look
at these data sheets to understand how the parts work and
just realize that your part is slower, so it won't meet the
timing from the Micron datasheets.
 
Here's a representative Micron part number:
 
MT48LC4M16A2TG-75
 
You can sheck the MIG cores available for your FPGA to see if
this or a similar part is supported.  Then run the core at a
slower clock rate than the rate you specify when customizing
so that it will be more likely to work with your part.
 
Regards,
Gabor
-- Gabor

感谢您的回复。
正如我所提到的，我正在使用spartan3（XC3S400-5 tqfp208）设备。但是mig只支持MT46xx和MT47xx部件。你提到了一个MT48xx部分。现在我认为mig不支持它。我该怎么办呢。
谢谢你的时间。
我喜欢Digital和参与其中的你！



以下为原文

Thanks for your reply.
As i mentioned i'm using spartan3(XC3S400-5 tqfp208) device.but the mig only support MT46xx and MT47xx parts.you mentioned a MT48xx part.now i think mig does not support it.what should i do next.
 
thanks for your time.
I love Digital
and you who involved in it!

似乎MIG只支持Spartan 3的双倍数据速率部分。您可以
尝试opencores.org，看看那里是否有可用的核心。
我受到了印象
Xilinx有一些用于单数据速率部分的内核，但它可能只适用于
EDK工具。
我一直为单数据速率部分设计自己的接口，但可能
对初学者来说有点野心勃勃。
问候，
的Gabor
-  Gabor



以下为原文

It seems that MIG only supports double data rate parts for Spartan 3.  You might
try opencores.org to see if there is a usable core there.  I was under the impression
that Xilinx had some cores for single data rate parts, but it might only be for
the EDK tools.
 
I have always designed my own interfaces for single data rate parts, but that may
be a bit ambitious for a beginner.
 
Regards,
Gabor
-- Gabor

gszakacs写道：似乎MIG只支持Spartan 3的双倍数据速率部分。你可能会
尝试opencores.org，看看那里是否有可用的核心。
我受到了印象
Xilinx有一些用于单数据速率部分的内核，但它可能只适用于
EDK工具。
我一直为单数据速率部分设计自己的接口，但可能
对初学者来说有点野心勃勃。
问候，
的Gabor
你可以分享你的代码吗？
提前致谢。
我喜欢Digital和参与其中的你！



以下为原文

gszakacs wrote:
It seems that MIG only supports double data rate parts for Spartan 3.  You might
try opencores.org to see if there is a usable core there.  I was under the impression
that Xilinx had some cores for single data rate parts, but it might only be for
the EDK tools.
 
I have always designed my own interfaces for single data rate parts, but that may
be a bit ambitious for a beginner.
 
Regards,
Gabor

can you please share your code.
thanks in advance.
I love Digital
and you who involved in it!

亲爱的gszakacs
你能帮助我从哪里开始。正如我从一开始就说我是新手这个世界并测试了几个现成的代码。你能给我一个工作的sdram控制器。
提前致谢。
我喜欢Digital和参与其中的你！



以下为原文

Dear  gszakacs
Can you help me where to start.As I said from the begining I'm new to this world and have tested several ready made codes available.Can you give me a working sdram controller.
 
Thanks in advance. 
I love Digital
and you who involved in it!

ali_asadzadeh写道：亲爱的gszakacs
你能帮助我从哪里开始。正如我从一开始就说我是新手这个世界并测试了几个现成的代码。你能给我一个工作的sdram控制器。
提前致谢。 
一个工作的SDRAM控制器免费？
滑稽！
----------------------------是的，我这样做是为了谋生。



以下为原文

ali_asadzadeh wrote:
Dear  gszakacs
Can you help me where to start.As I said from the begining I'm new to this world and have tested several ready made codes available.Can you give me a working sdram controller.
 
Thanks in advance. 

A working SDRAM controller for free? Funny!
----------------------------Yes, I do this for a living.