[U-Boot-Users] SDRAM Table for K4561633C - RL 75
wd at denx.de
Tue Sep 16 17:50:26 CEST 2003
in message <20030916132728.66509.qmail at web40404.mail.yahoo.com> you wrote:
> I have a board that has Samsung K4S561633C - RL75
> SDRAM. Two chips of ( 32 Mbit each total of 64MByte )
> I want the sdram_table parameters, where can I get
> them ?
You provide far too less information. Which sort of processor is
this? What is your processor clock? Which bus clock is your board
capable of? Are there any other devices on the bus that may influence
the bus speed?
Finally, if you should use some 8xx or 82xx processor, please note
that you CANNOT just copy a UPM table from one board and expect that
it will run on another board, too. To correctly initialize the SDRAM
on a board you need MORE than just the UPM table.
> The same chip is used in wepep250 board for ARM
> architecture, but I could not locate the SDRAM table.
Each memory controller is different; what works on system A may not
be applied without thinking on system B.
No matter if you find a similar board or not, there is one
unavoidable step in this part: you must first understand exactly what
you are doing.
All of this has been discussed before on this list. Many times.
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
There are no data that cannot be plotted on a straight line if the
axis are chosen correctly.
More information about the U-Boot