AM2434: DDR parameters

Koichiro Tashiro

Part Number: AM2434

Tool/software:

Hi,

My customer is asking for below DDR timing parameters for AM243x.
Where can I find them?

tDASS : time between CLK to DQS
tIS, tIH : time between CLK to ADR/CMD
tDS, tDH : time between DQS to DQ/DM

Thanks and regards,
Koichiro Tashiro

9 months ago

0 JJD 9 months ago

TI__Guru* 85990 points

is this for LPDDR4 or DDR4? Why do they need this, we don't typically provide this information?

Regards,

James

0 Koichiro Tashiro 9 months ago in reply to JJD

TI__Mastermind 22915 points

Hi James,

JJD said:
is this for LPDDR4 or DDR4?

It is for DDR4.

JJD said:
Why do they need this, we don't typically provide this information?

They are asking the information for transmission path analysis.

Thanks and regards,
Koichiro Tashiro

0 JJD 9 months ago in reply to Koichiro Tashiro

TI__Guru* 85990 points

I believe these values should be defined in the DDR4 JEDEC spec.

Regards,

James

0 Koichiro Tashiro 9 months ago in reply to JJD

TI__Mastermind 22915 points

Hi James,

I thought JEDEC spec only provides memory side requirements (setup and hold).
What the customer asks is SoC side delay.

Thanks and regards,
Koichiro Tashiro

0 JJD 9 months ago in reply to Koichiro Tashiro

TI__Guru* 85990 points

Koichiro,

all these values should be taken from the JEDEC spec, as the SoC interface will be compatible with those specs.

Regards,

James

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AM2434: DDR parameters