DM365 erasing issue with low power DDR2

lokesh kumar65677

Hi all,

I am working on the custom DM365 Board, with all parts same as DM365 EVM except low power DDR2.

We are using the DDR2 part number MT47H64M16HR-3L:H.

We are not able to erase the nand and flash the images also.

The log as below:

Waiting for SFT on the DM36x...
	Target:	Starting UART Boot...
	Target:	BOOTUBL
BOOTUBL commmand received. Returning CMD and command...
CMD value sent.  Waiting for DONE...
	Target:	   DONE
DONE received. Command was accepted.
	Target:	BOOTME

        Target:	BOOTME

Please can anyone help out me.

Thanks,

lokesh

over 13 years ago

0 Marko Shink over 13 years ago

Genius 3475 points

Hi,

I think you will have to change DDR timing and configuration registers in UBL and flashing tool,
according to your DDR datasheet and sprufi2.pdf.
Configuration is in file device.c, function DEVICE_DDR2Init().

Regards.

0 lokesh kumar65677 over 13 years ago in reply to Marko Shink

Intellectual 550 points

Hi Marko,

Thanks for the reply. I have changed the DDR timing and configurations in flashing tool.

I have changed all the configurations according to the the gel files of DM365EVM Revf.

The only change i can see between EVM DDR and our DDR is low power mode.

EVM DDR : MT47H64M16HR-3:E

Our DDR : MT47H64M16HR-3L

Still I am facing the same issue

Please suggest something on this.

Thanks

Lokesh

0 Marko Shink over 13 years ago in reply to lokesh kumar65677

Genius 3475 points

Hi Lokesh.

I am sorry it didn't work. Yes, it seems the only difference between those two DDRs is that -L is for low power.
I dont really have experience with low power mode, i hope someone who have experience with that DDR can help you.
But i did try several other Micron MT47H64M16 models : -25, -25E, -187E.
I also had problems until properly set memory registers in UBL, like :
- UBL did not start,
- UBL stoped in the middle,
- Linux frozen at boot up,
- aplication frozen when encoding is started;
- board is randomly frozen after some time (working from 1 minute to several hours).

After i properly set memory registers for specific DDR model in device.c in DEVICE_DDR2Init() registers SDCR, SDRCR, SDTIMR SDTIMR, everything works fine with all DDR models.
Reference is TI sprufi2.pdf and Micron 4561GbDDR2.pdf .

I usually use dm3xx_sd_boot-6.1 utillity for flashing from SD card, in that way i only have to change UBL, not gel.

Regards.

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DM365 erasing issue with low power DDR2