SPARTAN 3 FPGA的Nand Flash接口优点是什么

shahulakthar写道：
...我正在设计FPGA开发套件。
在那里我想添加Nand Flash。使用nand flash与spartan系列fpga的优点是什么。
我需要支持文档.reference schematics.Please Help Me。
您是否考虑过实施MMC或SD（或micro-SD）控制器而不是实现NAND闪存控制器？
MMC和SD卡都可以轻松编程为SPI接口模式。
SPI内存控制器代码随时可用。
通过使用MMC或SD卡（或其焊接到板上的等效设备，例如iNAND），您可以避免NAND闪存控制器必须包含的所有数据错误检测和纠正逻辑。
通过使用SPI接口模式，您可以避免使用Secure Digital“本机”模式所需的保密协议和许可费用。
- 鲍勃埃尔金德
签名：新手的自述文件在这里：http：//forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369总结：1。
阅读手册或用户指南。
你读过手册了吗？
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在原帖中查看解决方案



以下为原文

 

shahulakthar wrote:
...  I am designing FPGA development kit . In that i would like to add Nand Flash.what will be the advantage of using nand flash with spartan series fpga. I need  supporting document .reference schematics.Please Help Me.

 
Rather than implement a NAND flash controller, have you considered implementing a MMC or SD (or micro-SD) controller?  Both MMC and SD cards can be easily programmed to SPI interface mode.  SPI memory controller code is readily available.
 
By using MMC or SD cards (or their soldered-to-the-board equivalents, such as iNAND), you can avoid all the data error detection and correction logic that a NAND flash controller must include.  By using the SPI interface mode, you can avoid the non-disclosure agreements and licensing fees required for using Secure Digital 'native' mode.
 
- Bob Elkind
SIGNATURE:
README for newbies is here: http://forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369

Summary:
1. Read the manual or user guide.  Have you read the manual? Can you find the manual?
2. Search the forums (and search the web) for similar topics.
3. Do not post the same question on multiple forums.
4. Do not post a new topic or question on someone else's thread, start a new thread!
5. Students: Copying code is not the same as learning to design.
6 "It does not work" is not a question which can be answered. Provide useful details (with webpage, datasheet links, please).
7. You are not charged extra fees for comments in your code.
8. I am not paid for forum posts.  If I write a good post, then I have been good for nothing.View solution in original post

shahulakthar写道：
...我正在设计FPGA开发套件。
在那里我想添加Nand Flash。使用nand flash与spartan系列fpga的优点是什么。
我需要支持文档.reference schematics.Please Help Me。
您是否考虑过实施MMC或SD（或micro-SD）控制器而不是实现NAND闪存控制器？
MMC和SD卡都可以轻松编程为SPI接口模式。
SPI内存控制器代码随时可用。
通过使用MMC或SD卡（或其焊接到板上的等效设备，例如iNAND），您可以避免NAND闪存控制器必须包含的所有数据错误检测和纠正逻辑。
通过使用SPI接口模式，您可以避免使用Secure Digital“本机”模式所需的保密协议和许可费用。
- 鲍勃埃尔金德
签名：新手的自述文件在这里：http：//forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369总结：1。
阅读手册或用户指南。
你读过手册了吗？
你能找到手册吗？2。
搜索论坛（并搜索网页）以寻找类似的主题。
不要在多个论坛上发布相同的问题。
不要在别人的主题上发布新主题或问题，开始新的主题！5。
学生：复制代码与学习设计不同.6“它不起作用”不是一个可以回答的问题。
提供有用的详细信息（请与网页，数据表链接）.7。
您的代码中的评论不需要支付额外费用。
我没有支付论坛帖子的费用。
如果我写一篇好文章，那么我一无所获。



以下为原文

 

shahulakthar wrote:
...  I am designing FPGA development kit . In that i would like to add Nand Flash.what will be the advantage of using nand flash with spartan series fpga. I need  supporting document .reference schematics.Please Help Me.

 
Rather than implement a NAND flash controller, have you considered implementing a MMC or SD (or micro-SD) controller?  Both MMC and SD cards can be easily programmed to SPI interface mode.  SPI memory controller code is readily available.
 
By using MMC or SD cards (or their soldered-to-the-board equivalents, such as iNAND), you can avoid all the data error detection and correction logic that a NAND flash controller must include.  By using the SPI interface mode, you can avoid the non-disclosure agreements and licensing fees required for using Secure Digital 'native' mode.
 
- Bob Elkind
SIGNATURE:
README for newbies is here: http://forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369

Summary:
1. Read the manual or user guide.  Have you read the manual? Can you find the manual?
2. Search the forums (and search the web) for similar topics.
3. Do not post the same question on multiple forums.
4. Do not post a new topic or question on someone else's thread, start a new thread!
5. Students: Copying code is not the same as learning to design.
6 "It does not work" is not a question which can be answered. Provide useful details (with webpage, datasheet links, please).
7. You are not charged extra fees for comments in your code.
8. I am not paid for forum posts.  If I write a good post, then I have been good for nothing.

嗨鲍勃，
谢谢你的回复。
这对我来说更有用。：邋happy的快乐：



以下为原文

Hi Bob,
thank u for the reply. It is lot more useful for me.:smileyhappy:

请注意，SPI接口是MMC规范中的“May”工具，而不是“Will”工具。
Transcend刚刚将SPI接口从他们的4GB MMC plus卡上取下（部件号：TS4GMMC4）
这已经成为一个相当大的冲击，现在我需要很快找到一个1位（或4或8）驱动程序。
任何人都可以免费使用Virtex4FX吗？
不是......



以下为原文

Be warned that the SPI interface is a "May" implement in the MMC spec, not a "Will" implement.
 
Transcend just took the SPI interface off their 4GB MMC plus cards (part no: TS4GMMC4)
 
This has come as a rather big shock, and now I need to find a 1-bit (or 4, or 8) driver very quickly.
 
Anyone have a free implementation for the Virtex4FX lying around?
 
Thought not...

genevaethel写道：
请注意，SPI接口是MMC规范中的“May”工具，而不是“Will”工具。
Transcend刚刚将SPI接口从他们的4GB MMC plus卡上取下（部件号：TS4GMMC4）
这已经成为一个相当大的冲击，现在我需要很快找到一个1位（或4或8）驱动程序。
任何人都可以免费使用Virtex4FX吗？
不是......
你提出了一个很好的观点。
通过MMC规范版本4.2，需要并定义SPI。
在最新版本4.3中，不再包含SPI（它不仅是'可选'，它被省略，因此未定义）。
如果您使用的是MMC卡，那么您可能会赌博卡供应商（或者不）希望向后兼容SPI模式。
另一方面，版本3.0中的Secure Digital规范包括，定义并要求SPI支持。
设计特定的NAND闪存卡目标是有风险的，因为技术（设备密度，掩模步进，控制器设计）如此快速地进行搅拌。
与DRAM设备定位非常相似。
这是坏消息。
好消息是，对于给定的闪存卡，您应该拥有许多许多替代资源 - 它们大多无处不在（可互换）。
如果Transcend搅拌他们的MMC控制器并放弃SPI模式支持，那么A-Data和宝丽来和PQI以及金士顿和Viking以及许多其他人应该可以正常工作。
我可能错了（MMC卡的可用性），因为MMC的受欢迎程度已经很快消失了......在这种情况下你可能想尽快跳下MMC列车。
这让我想到了下一个建议....
或者......切换到SD / miniSD / microSD卡，这些卡仍然需要支持SPI。
我的理解是，SD卡产品和数据源的数量超过MMC产品和来源的数量（并且不断增长）。
如果你有MMC规范（可以从JEDEC下载，他们现在拥有标准），MMC的“原生”核心与SPI模式没有什么不同。
命令是类似的等等。就此而言，SD和MMC彼此相似（但故意不相同）。
想要包含SD卡主机接口的小型设计师面临的最大问题是访问规范和SD卡标识以及“祝福”的气密许可要求。
这也排除了原生模式SD开源内核 - 您在opencores.org上找不到任何内容。
选项快速摘要（最不困难的，最难的）：
1.选择另一个支持SPI的MMC卡
2.为您的SPI模式主机控制器添加SD支持（非常小的差异），并选择SD卡设计目标
3.实现本机模式MMC
4.实现本机模式SD
- 鲍勃埃尔金德
签名：新手的自述文件在这里：http：//forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369总结：1。
阅读手册或用户指南。
你读过手册了吗？
你能找到手册吗？2。
搜索论坛（并搜索网页）以寻找类似的主题。
不要在多个论坛上发布相同的问题。
不要在别人的主题上发布新主题或问题，开始新的主题！5。
学生：复制代码与学习设计不同.6“它不起作用”不是一个可以回答的问题。
提供有用的详细信息（请与网页，数据表链接）.7。
您的代码中的评论不需要支付额外费用。
我没有支付论坛帖子的费用。
如果我写一篇好文章，那么我一无所获。



以下为原文

genevaethel wrote:
Be warned that the SPI interface is a "May" implement in the MMC spec, not a "Will" implement.
 
Transcend just took the SPI interface off their 4GB MMC plus cards (part no: TS4GMMC4)
 
This has come as a rather big shock, and now I need to find a 1-bit (or 4, or 8) driver very quickly.
 
Anyone have a free implementation for the Virtex4FX lying around?
 
Thought not...

You bring up a good point.  Up through MMC spec version 4.2, SPI is required and defined.  In the latest version, 4.3, SPI is no longer included (it's not only 'optional', it's omitted and therefore undefined).
 
If you are using an MMC card, you're gambling that the card vendor does (or does not) want backwards compatibility with respect to SPI mode.
 
On the other hand, the Secure Digital spec up through version 3.0 includes, defines, and requires SPI support.
 
Designing to a specific NAND flash memory card target is risky, as the technology (device density, mask stepping, controller design) churns so quickly.  Very similar to DRAM device targeting.  That's the bad news.  The good news is that you should have many many many alternate sources for a given flash memory card -- they are mostly ubiquitous (interchangeable).  If Transcend churns their MMC controller and drops SPI mode support, then A-Data and Polaroid and PQI and Kingston and Viking and many many others should work fine in its place.  I could be wrong on this (availability of MMC cards), as MMC popularity has faded a lot, rapidly...  in which case you might want to jump off the MMC train as soon as possible.  Which leads me to the next suggestion....
 
Or...  switch to SD/miniSD/microSD cards, which are still required to support SPI.  My understanding is that the number of SD card products and sources outnumbers MMC products and sources by a large (and growing) multiple.
 
If you have the MMC spec (downloadable from JEDEC, they now own the standard), the MMC 'native' core isn't all that different from the SPI mode.  Commands are similar, etc. etc.  SD and MMC are similar to one another (but deliberately non-identical), for that matter.  The biggest problem with small-fry designers wanting to include an SD card host interface is the air-tight licensing requirement for access to the specification and the SD card logo and 'blessing'.  This also precludes native-mode SD open-source cores -- you won't find any at opencores.org.
 
Quick summary of options (least difficult first, most difficult last):
1.  pick another MMC card which supports SPI
2.  add SD support to your SPI mode host controller (very small difference), and pick a SD card design target
3.  implement native-mode MMC
4.  implement native-mode SD
 
-- Bob Elkind
SIGNATURE:
README for newbies is here: http://forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369

Summary:
1. Read the manual or user guide.  Have you read the manual? Can you find the manual?
2. Search the forums (and search the web) for similar topics.
3. Do not post the same question on multiple forums.
4. Do not post a new topic or question on someone else's thread, start a new thread!
5. Students: Copying code is not the same as learning to design.
6 "It does not work" is not a question which can be answered. Provide useful details (with webpage, datasheet links, please).
7. You are not charged extra fees for comments in your code.
8. I am not paid for forum posts.  If I write a good post, then I have been good for nothing.