How to find memory data width (x16 or x32?)
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From: larwe on 15 May 2010 15:52 On May 15, 1:15 pm, Bhavik <bhavik.pa...(a)gmail.com> wrote: > still work if I setup a bigger value of rows and columns, but It would > create memory aliasing problem (or feature!), which I want to avoid. SO CONFIGURE FOR THE WIDEST POSSIBILITY AND TEST FOR THE MEMORY ALIASING. Sheesh, this is what I and others have been telling you.
From: Bhavik on 18 May 2010 04:39 On May 15, 9:52 pm, larwe <zwsdot...(a)gmail.com> wrote: > On May 15, 1:15 pm, Bhavik <bhavik.pa...(a)gmail.com> wrote: > > > still work if I setup a bigger value of rows and columns, but It would > > create memory aliasing problem (or feature!), which I want to avoid. > > SO CONFIGURE FOR THE WIDEST POSSIBILITY AND TEST FOR THE MEMORY > ALIASING. Sheesh, this is what I and others have been telling you. Thanks all for the help. I am now able to correct memory width and size configuration. I still have one problem. The approach suggested here works only if there is a memory connected on given chip select. Is it possible to find if the memory is actually present on a given chip select? I have a device which has 256MB SDRAM on cs0, but there is no memory on cs1. I tried reading some status registers for cs1, but they look the same as cs0. So I can't determine if the memory is actually present there.
From: RCIngham on 18 May 2010 04:55 >On May 15, 9:52=A0pm, larwe <zwsdot...(a)gmail.com> wrote: >> On May 15, 1:15=A0pm, Bhavik <bhavik.pa...(a)gmail.com> wrote: >> >> > still work if I setup a bigger value of rows and columns, but It would >> > create memory aliasing problem (or feature!), which I want to avoid. >> >> SO CONFIGURE FOR THE WIDEST POSSIBILITY AND TEST FOR THE MEMORY >> ALIASING. Sheesh, this is what I and others have been telling you. > >Thanks all for the help. I am now able to correct memory width and >size configuration. >I still have one problem. The approach suggested here works only if >there is a memory connected on given chip select. > >Is it possible to find if the memory is actually present on a given >chip select? >I have a device which has 256MB SDRAM on cs0, but there is no memory >on cs1. I tried reading some status registers for cs1, but they look >the same as cs0. >So I can't determine if the memory is actually present there. > Walking 1 Data Test. Ref: http://www.netrino.com/Embedded-Systems/How-To/Memory-Test-Suite-C --------------------------------------- Posted through http://www.EmbeddedRelated.com
From: Bhavik on 18 May 2010 11:15
> Walking 1 Data Test. > > Ref:http://www.netrino.com/Embedded-Systems/How-To/Memory-Test-Suite-C Thanks for this link. I have tried the test given there to check for missing memory chip. But in my case, the controller hangs if I try to access the memory which is not connected. When I am using JTAG to debug this, it shows "emulation running" message. Any inputs on this? |