T4240 DDR Validation Tool

[dannygale]

We have a custom board built around a T4240 and are having some trouble getting the DDR up to speed. A handful of questions regarding the T4240's DDR and the QorIQ configuration suite DDR validation tool:

1. Does the QorIQ DDR validation tool support the T4240? The T4240 isn't listed on the product page as a supported product, but the QorIQ configuration suite doesn't seem to be complaining.
2. The "Centering the clock" test matrix doesn't include all values of CLK_ADJ -- it only includes three. See the attached screenshot. Why is this? How can we get it to include all valid values of CLK_ADJ?
3. You can also see from the attached screenshot that it's not running the whole test matrix -- why not? How can we get it to run the whole test matrix?

Thanks

[lunminliang]

See comments from tools expert:

I confirm that T4240 is supported in QCS 3.0.5 and DDRv 2.0.2

For devices >=P2040 the centering the clock is optimized meaning we do not do a full variation.

Customer should be fine with the values after running both tables.​

Do you uses the Read from SPD wizard option? Using that option would ensure that DDR is being configured with the vendor optimal settings stored in SPD. I strongly encourage to use that option.

[dannygale]

Thank you for your replies.

We aren't using SPD, since we are using multi-chip modules that do not include SPD EEPROMs.

Using the values calculated in the DDRv tool, we were able to bring DDR up to full speed.Thank you!

[addiyi]

1. T4240 is supported by DDRV;

2. There are two tables for CLK_ADJ. First table is made for discover very rapid some combinations of CLK_ADJ, WRLVL_START, which are working on board. And the second table is somehow a fine-tuning for CLK_ADJ.

3. When working combination of CLK_ADJ, WRLVL_STAR are discovered, the rest of the cells will skipper and tests in the second table is started.

Adrian

[lunminliang]

3. You can also see from the attached screenshot that it's not running the whole test matrix -- why not? How can we get it to run the whole test matrix?

If I understand you correctly, this is choose from the upper right of the window, click select all cells button.