AM623: Look for the LPDDR4 pins delay information

Ryan Jiang

Part Number: AM623

HI,

I downloaded the IBIS model of AM62X from TI.com and set it up.

I noticed that it does not have the Pin delay of LPDDR4 pins, in the app note, it also states in the Application Note
"AM62x DDR Board Design and Layout Guidelines" that:

At this time, TI does not provide timing parameters
for the processor’s DDR PHY interface.

Does that mean TI does not have this information ready yet for AM623 LPDDR4 pin timings?

over 1 year ago

0 Kallikuppa Sreenivasa over 1 year ago

TI__Guru** 124028 points

Hello Ryan Jiang

Thank you for the query.

Can you please share the use case.

For the propagation delay, the delay here is only for the DDR/LPDDR traces on the board. We don’t need to include any package level propagation delay.

Regards,

Sreenivasa

0 Ryan Jiang over 1 year ago in reply to Kallikuppa Sreenivasa

Prodigy 10 points

HI Kallikuppa ,

I am routing the LPDDR4 with AM623x.

So in the case of AM623x with LPDDR4, as long as I match the trace delay and LPDDR4 side on package delay, it should work, the TI's AM623x on package delay does not need to be included?

Regards,

Ryan Jiang

0 Kallikuppa Sreenivasa over 1 year ago in reply to Ryan Jiang

TI__Guru** 124028 points

Hello Ryan Jiang

Thank you for the note and your understanding is correct. Please ensure you follow the below guide.

https://www.ti.com/lit/an/sprad06/sprad06.pdf

Regards,

Sreenivasa

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AM623: Look for the LPDDR4 pins delay information