Hello Lee, 

hank you for the query.

Please refer to the below section 

https://www.ti.com/lit/ds/symlink/am3358.pdf

7.7.2.3.3.2 Compatible JEDEC DDR3 Devices

otherwise, should I use two 8bit databus DDR3 memories? 

Please refer to 7.7.2.3.3 DDR3 Interface of he datasheet.

Regards,

Sreenivasa

Hello Lee, 

Please refer below thread for additional information.

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/418682/can-am335x-support-1gb-ddr3-512mb-2-when-using-ddr-interface

Regards,

Sreenivasa

Thanks for replying

When I send SPL to processor by XMODEM, It prints out nothing.

I guess It is because my custom board has only 8bit databus with the DDR3 Memory.

Am I right?

Do you have any idea how to operate my custom board?

or are you sure that I have to modify and make new board?

Really Appreciate.

Hello Lee, 

Thank you for the inputs.

Would it be possible to share the block diagram or schematic page for the DDR interface?

Regards,

Sreenivasa

Hello Sreenivasa

Yes, I attached SOC page and DDR page.

Really Thank you.

SOC.pdf  

DDR.pdf

Hello Lee, 

Thank you for the inputs.

Let me review the inputs and check internally. I will update you when i have some inputs.

Regards,

Sreenivasa

Oh, I see

I redesigned the schematic.

Could you take a look at my schematic, please?

I hope you can check if there are some mistakes..

What I hope you should note:

1. R149, R162 is DNI

2. The value of resistor R147~179 is 33 ohms

3. The schematic part of VTT

4. Routing between SOC and DDR3

5. Something else you thought as important

Really Thanks.

3806.SCH.pdf

Hello Lee, 

Thank you for the note.

Let me check internally how best we can support.

Do you have a timeline for the review ?

Are you working with a TI FAE

Regards,

Sreenivasa

Hi, Thanks for reply and review.

There isn't a critical timeline but the sooner the better.

How long does it take at most as you guess?

Are you working with a TI FAE => no

Thanks.

Hello Lee, 

Thank you for the inputs. We typically do not support a full schematic review.

Please give me a couple of days to update you on how best we could support considering you are redesigning  the board.

If you could provide a block diagram if available and let us know the blocks to focus that would help.

Regards,

Sreenivasa

Hello Sreenivasa,

Thank you for reply.

I don't request to review full schematic.

I just attached schematic pages of AM3352 Processor and DDR3.

I just hope the experts take a look at the interfaces between AM3352 and DDR3 and parts around DDR3.

Really thanks for your efforts to give me a help.

Hello Lee, 

Thank you for the note. The full schematics review is general note. 

I understand that you are not asking for a full schematic review and hence i am working to see how best to support.

Regards,

Sreenivasa

Hello Lee, 

I have added your schematics review to the queue we have. 

We should be able to provide the schematics review inputs by mid or end of next week.

For the purpose of tracking or visibility, please close this thread and open a new thread with the title and update me

AM3352: DDR3 schematics review 

Thanks,

Sreenivasa

Hello Sreenivasa.

Ok, I see.!

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1109220/am3352-ddr3-schematics-review

Thanks

Hello Lee, 

Thank and noted.

Regards,

Sreenivasa