AM3352: DDR Simulation, DQ/DM values

Nicholas Carley

Part Number: AM3352

Customer is doing DDR simulation right now and have the below questions. Section 7.7.2.3.3.9 makes it sound like they need to all be enabled, but wanted to double check.

ODT IBIS Model selectors.

AM3352 side

DQS : Is ODT Disable or Enabled model ?

DQS# : Is ODT Disable or Enabled model ?

DQ : Is ODT Disable or Enabled model ?

DM : Is ODT Disable or Enabled model ?

DRAM side

DQS : Is ODT Disable or Enabled model ?

DQS# : Is ODT Disable or Enabled model ?

DQ : Is ODT Disable or Enabled model ?

DM : Is ODT Disable or Enabled model ?

over 5 years ago

0 Nicholas Carley over 5 years ago

TI__Genius 9245 points

One more question.

Controller – Clk,Add/Cmd,Ctl

which model should we select for simulation?

0 Shriram Moharil over 5 years ago in reply to Nicholas Carley

TI__Expert 4190 points

We can use the below scheme in general:

Reads:

AM335x: ODT enabled; Driver disabled

SDRAM: ODT disabled; Driver enabled

Writes:

AM335x: ODT disabled; Driver enabled

SDRAM: ODT enabled; Driver disabled

Address/Cmd/Clk:

AM335x: ODT disabled; Driver enabled

SDRAM: ODT enabled; Driver disabled

best regards,

-Shriram

0 Shriram Moharil over 5 years ago in reply to Shriram Moharil

TI__Expert 4190 points

Pl note that the above settings apply to both DQ/DM on the controller/memory side.

-Shriram

0 Shriram Moharil over 5 years ago in reply to Shriram Moharil

TI__Expert 4190 points

Hi,

Just checking back since on this. We hope the answer resolved your question. Pl let us know if any further questions.

regards,

-Shriram

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AM3352: DDR Simulation, DQ/DM values