OMAP3525: Move from synchronous to asynchronous NOR flash for booting.

Lucas de Oliveira e Silva

Part Number: OMAP3525

Hello e2e Team,

Please help my customer with the following issue.

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PROBLEM: Currently, their device boots from the Micron PC28F256P30BFE (256 Mbit) parallel NOR flash, but this part will be discontinued. In looking for alternatives with the distributor, they could not find any synchronous NOR flash, only asynchronous. This solution isn't ideal, because it might implicate many changes to their layout and software.

QUESTION: Do you have suggestions on how to deal with this issue (e.g. part recommendations)?

I see that OMAP3525 supports asynchronous communication as well, so I'm wondering if they couldn’t simply switch modes within the MPU? I hope this might not impact their layout/software substantially, since they’re switching from synchronous to asynchronous and not the other way around.

Thanks for your time and support!

over 1 year ago

0 Kallikuppa Sreenivasa over 1 year ago

TI__Guru**** 191939 points

Hello Lucas de Oliveira e Silva

Thank you for the query.

I am reviewing the inputs and working internally to assign to the right expert to support.

Regards,

Sreenivasa

0 Lucas de Oliveira e Silva over 1 year ago in reply to Kallikuppa Sreenivasa

TI__Prodigy 50 points

Hi Kallikuppa,

Thanks for the response!

Have you found a contact for me yet?

Best,

Lucas

0 Kallikuppa Sreenivasa over 1 year ago in reply to Lucas de Oliveira e Silva

TI__Guru**** 191939 points

Hello Lucas de Oliveira e Silva

Thank you for following.

I am internally checking.

Let me follow-up and update you.

regards,

Sreenivasa

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

TI__Guru**** 191939 points

Hello Lucas de Oliveira e Silva

Please refer below inputs i received from the expert

OMAP35x doesn’t use synchronous NOR boot, only async. The part number in the thread does have the option to operate the memory in async mode. So I think it would be best to confirm with the customer which mode they are using the memory. Maybe get a schematic of the interface and make sure the CLK is not connected. CLK should be grounded on the memory side. They should check with Micron for compatible memories that are available

Please review and share the relevant information.

Regards,

Sreenivasa

0 Lucas de Oliveira e Silva over 1 year ago in reply to Kallikuppa Sreenivasa

TI__Prodigy 50 points

Hello Sreenivasa,

Use of synchronous NOR mode has been confirmed. I suggested move to asynchronous NOR for booting.

I'll let the customer comment directly here for further questions.

Best,

Lucas

0 Kallikuppa Sreenivasa over 1 year ago in reply to Lucas de Oliveira e Silva

TI__Guru**** 191939 points

Hello Lucas de Oliveira e Silva

Thank you.

Regards,

Sreenivasa

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OMAP3525: Move from synchronous to asynchronous NOR flash for booting.