AM437X Input signal rise time and fall time from NAND flash memory ?

Hi,

This is very likely a typo in the AM437X datasheet. I will ask the factory team for confirmation.

Hi Biser,

Thank you for your quick reply.
I understand that it may be the mistake of the AM437x datasheet.

What do you think about the current situation regarding this matter?

Best Regards,
Shigehiro Tsuda

I have notified the factory team about this. Any feedback from them will be posted directly here.

Hi Biser,

What do you think about the current situation regarding this matter?
In a schedule of the completion of the product board, our customer must choose the nand device in accord with specifications immediately.
Therefore the confirmation of these specifications is necessary.
When will your factory team reply it?

Best Regards,
Shigehiro Tsuda

I have escalated the request.

I am double checking, but this should be min=1ns, max=5ns.  I will get the datasheet updated once I verify

Regards,

James

Hi James,

Thank you for your reply.
I understand that the AM437x data sheet is wrong.
I'll talk with our customer.

Best Regards,
Shigehiro Tsuda

Hi James,

I think that it became less than min 1ns when I measured input rise time of VIH=2V from VIL=0.8V.
Input rise time is uneven, but becomes about 0.8ns from about 0.55ns.

The data sheet of AM437x is min 0.3ns, but your answer is min=1ns.

Will there be a problem in Input rise time of the result of a measurement mentioned above?

I attach the wave pattern which measured GPMC_ad0.

Our customers think that there is no definition in min or they do not have any problem if it is min 0.3ns.

Best Regards,

Shigehiro Tsuda

Hi James,

Is there update information?

Best Regards,
Shigehiro Tsuda

Hi James,

Thank you for correspondence in various ways.
Is there update information?
Our customer says that an NAND device cannot select when these specifications are not correct.
Because hardware cannot be fixed, they say that I want an answer immediately.
Would you reply it by the end of this week?

Best Regards,
Shigehiro Tsuda

Hi,

Is there update information?

Because hardware cannot be fixed, our customer is troubled.

Would you reply it?

Best Regards,

Shigehiro Tsuda

Hi James,

Thank you for this reply.

I can understand that  the input rise/fall times are specified from 10-90% of full input range.

In this case because this wave pattern meets specifications of min 1ns, I think that I do not have any problem.
Because it is incomprehensible, I expect the correction of the data sheet.

I will reply our customer.
I thank for your correspondence.

Best Regards,

Shigehiro Tsuda