Re: SDRAM Memory On the SOPC board

Thanks Soban for the answer. 
Do u mean that it could be useful to store some information about the
system in this EEPROM like which processor is embedded , the LCD used,
Keyboard/mouse.. 128 bytes of data would be used for some useful
information (like a tag for the system).. Next , how could we program
this EEPROM .. I mean would we be able to program it through our system
OR1k processor after getting the memory controller or is there any other
methods to program the SPD EEPROM core on the SDRAM ..
give me an example of a practical example of data that u have stored in
128 bytes in SPD and how u wrote them to it ..

BTW; My yahoo mail is mosalem2003-/[email protected]
Thank you so much for your reply Soban, The document also contains some
more questions . I hope that you would be able to feed me with such an
important replies ..Thanks ..
Best Regards,

-- 
Mohamed A.Salem
Handasa Arabia Organization
www.handasarabia.org
 

On Thu, 2003-09-04 at 17:28, Soban Shoeb Chawre wrote:
> Hello Salem,
> 
> With reference to your question in pdf: 
> Question : Who ever knows what woud be the lines for seria data and
> seria clock be used for feed me back with his information
> 
> The SDRAM Modules contain Serial Presence Detect(SPD) EEPROM along with
> the SDRAM memory core.
> 
> In almost all SDRAM Modules this SPD EEPROM has capacity of 256
> Bytes.Out of this first 128Bytes are already programmed by the
> manufacturer to store information about the SDRAM like timings paramater
> values, No.of Rows,No.of Columns, Manufacturer, ...etc on it.
> It is useful for knowing the devices that are conncetd to the system.
> 
> The remaining 128 Bytes can be used for storing user data.
> 
> The Serial data and Serial clock are used for accessing this SPD EEPROM. 
> 
> Regards,
> -Soban.
-- 
Mohamed A.Salem
Handasa Arabia Organization
www.handasarabia.org


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