AM3517 EVM + Application board uboot issue

What is your S11 setting on the application board? I have booted just fine with the application board connected myself, and a quick look at the schematics makes it seem like you can control what chip select line is mapped where with S11 switch 3, which I believe should be defaulted to off for NAND on CS0. If this was set wrong on the application board, it would mess up the access to NAND for booting purposes.

Hi Bernie:

Thanks for your quick response, I checked S11 on the application board and all of the switches are set to off, hence according to your explanation I shouldn't be getting this error when trying to boot.

Regards

Diego Chaverri

Diego,

Which revision of silicon are you using?  Things work fine for me, with or without the application board attached.  Here's my setup:

SOM: Rev 5
Experimenter Board: Rev 4
Application Board: Rev 4

Texas Instruments X-Loader 1.44 (Dec  8 2009 - 22:58:46)
U-Boot 2009.08 (Dec 08 2009 - 23:00:10)

I'll try this afternoon with your versions of u-boot and x-loader.

Hi David:

Hmm, about the revision number of the components I have, all I can read is a sticker placed on the experimenter board and the application board, there it comes a revision letter, not a number (don't know if there is a way of relate this data to the silicon revision you have):

Experimenter Board:  Rev D

Application Board: Rev C

How do I read the SOM?

Thanks

Diego Chaverri

Diego, ensure switch S7-7 is set to OFF.  This sets the I/O to 3.3V, as opposed to 1.8V when it's ON.  The application board is only intended to work at 3.3 V I/O, and I see the same failure as you when it's set to 1.8V.

Also, make sure the application board is securely attached.

David, yes the S7 - 7 is set to OFF, and it is securely attached.

Thanks for your help

Diego Chaverri

I am not sure I get your revision markings, I have been under the impression that the boards are all revisioned by number and not letter, see the image below.

Do your stickers look at all like these?

Hi Bernie:

Well seems like I was reading the right stickers (you can't miss those), but I have letters for the revision version:

Diego

Please take a look at the errata posted on the Logic website located here:  http://support.logicpd.com/downloads/1295/1015423_AM3517_EVM_Errata_022310.pdf  Please note that you may need to register your kit to get access to this document.  Errata E0008 describes rework that was performed on the application board that might cause the issues you are seeing; some of this rework was not completed correctly.

Please let me know if you have any issues retrieving the Errata document.

Nate

Hi Nate:

I took a look at the Errata document you suggested, I do have that funny looking wire but one end is connected to J3,45,47 (there is a shortcircuit between these two) and the other end I'm not sure where it goes to (it is soldered but I have no clue to what). I also noticed that the errata note applies to the affected part number 1014473, mine is 1013711 Rev A which I assume is older.

Thanks

Diego Chaverri

Diego

Do you ever plan to boot from the NOR flash device?  If not, I would suggest you cut that wire and see if that helps.  1013711 is the part number for the PCB itself, 1014473 is the part number for the assembled product.  According to your pictures above, you have 1014473 so this errata would affect you.

Nate

Hi Nate:

No, I don't plan to boot from NOR, however I cut the wire and gave it a try with the same results. Thanks for your help though.

Regards

Diego Chaverri