TMS570LS3137: EMIF SDRAM - Data written to address 0x8000000 is found multiplied at addresses 0x8100000, 0x8200000, ...

Zoltan Carol Veber

Part Number: TMS570LS3137

Hi all,

We have a IS45S16320F-7BLA2 connected to the emif interface of an TMS5703137CGWTQEP.

The issue that i am facing is that i cannot use the full size of the SDRAM, as i noticed that the data that i am writing to the start address of 0x8000000 is found later at addresses 0x8100000, then again at 0x8200000... until 0x8700000.

I am attaching the project and some screenshots of the hw schematic and from the CCS. Hope I have provided all the info needed for an opinion.

Thanks in advance.

Zoltan 4186.Emif_Test.zip

over 5 years ago

0 Jiri Dobry over 5 years ago

Expert 1810 points

What is your EMIF setting? Is register SDCR.IBANK = 2h? (4 internal banks are used)

It looks like improper SDRAM configuration. See TRM (SPNU499C) chapter 17.2.5.2 Interfacing to SDRAM Table 17-6. 16-bit EMIF Address Pin Connections line 128M bits * 16 * 4

0 Zoltan Carol Veber over 5 years ago in reply to Jiri Dobry

Prodigy 80 points

Hi Jiri,

Thanks for the reply. Yes, the value of SDCR.IBANK = 2h. See the attached emif.c file.

Unfortunatley, the behaviour is the same.0844.emif.c

0 Jiri Dobry over 5 years ago in reply to Zoltan Carol Veber

Expert 1810 points

Problem is column size. You are using "elements_256".
See to SPNU499C chapter 17.2.5.11 Mapping from Logical Address to EMIF Pins
Compare to RAM datasheet. It need 1K Column Address (32M x 16 organization)

Try "elements_1024" setting.

0 Zoltan Carol Veber over 5 years ago in reply to Jiri Dobry

Prodigy 80 points

Hi Jiri,

Thanks for the support, this solved my problem.

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TMS570LS3137: EMIF SDRAM - Data written to address 0x8000000 is found multiplied at addresses 0x8100000, 0x8200000, ...