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Thanks for your reply. I did try to reduce down my ECLKIN signal to 50MHz to
see the effect. But unfortunately i still couln't load any code into my SDRAM, while my PowerOnSelfTest code (runnning from IRAM) was successfully able to read/write on the entire memory of the SDRAMs...?! It's quite hard for me to separate whether it's a hardware or software problem as : - the hardware is based on a TI design, and only minor changes have been made - my POST code works well, and I seem to have a functionally correct board in my hands Any others suggestions, Many thanks, Ludo. -----Original Message-----From: Jeff Brower <>To: Ludovic Tramart <>Cc: TI goup <>Sent: 23/06/03 14:21Subject: Re: [c6x] problem with SDRAMLudovic Tramart- You have to separate whether it's hardware or software to start debugging. Try with SDRAM clock of 50 MHz. Still see the same results? Jeff Brower system engineer Signalogic > > Hi everybody, > > I've got a problem with the DSP board we just designed, I hope you can help me on > this one: > > The design is mainly based on the 6711DSK, same DSP (6711 150MHz), same SDRAM > family (MT48LC4M16A2-7E but CAS=2 instead of 3 on latest DSK) clock at 100MHz > through the EMIF, CE0 is used. > > My board works well, except for the SDRAMs. I am able to fill entirely my SDRAM > with data using Edit->Memory->Fill in CCS. Then i am able to read it by using > File->Data->Save in CCS still. So far it's fine. > > Problem starts to occur when i want to load my program into SDRAM (my DSP internal > mem is a 4-way cache), this error occur : "Data Verification Fail at address > 0x80000150. Please verify target memory and memory map" > > I've been trying to debug this problem by optimizing the EMIF settings for SDRAM > (SDCTL, SDTIM, SDEXT) but i have been unsuccessfull so far. > > I begin to question the hardware design. But it's should be OK as the SDRAMs are > directly connected to my DSP, it's quite a straightforward design, and as i said > based on the 6711DSK. > > Any suggestions to help me pointing the problem would be welcome, > > Thanks, > Ludo > > ------------------------- > Ludovic Tramart, DSP System Engineer > www.fulcrumvoicetech.com > FULCRUM, Hillbottom Road > High Wycombe, HP12 4HJ > Tel : +44 (0)1494 437575 > Fax: +44 (0)1494 473324 > _____________________________________ > Note: If you do a simple "reply" with your email client, only the author of this > message will receive your answer. You need to do a "reply all" if you want your > answer to be distributed to the entire group. > > _____________________________________ > About this discussion group: > > To Join: Send an email to > > To Post: Send an email to > > To Leave: Send an email to > > Archives: http://www.yahoogroups.com/group/c6x > > Other Groups: http://www.dsprelated.com > > ">http://docs.yahoo.com/info/terms/ ------------------------- Ludovic Tramart, DSP System Engineer www.fulcrumvoicetech.com FULCRUM, Hillbottom Road High Wycombe, HP12 4HJ Tel : +44 (0)1494 437575 Fax: +44 (0)1494 473324 ------------------------- Ludovic Tramart, DSP System Engineer www.fulcrumvoicetech.com FULCRUM, Hillbottom Road High Wycombe, HP12 4HJ Tel : +44 (0)1494 437575 Fax: +44 (0)1494 473324 |
Fw: Re(2): problem with SDRAM
Started by ●June 23, 2003
