FM31276 Serial Number Default Values

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Anonymous
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Dear Support Team!

We are using the FM31276 and recognize a first power on event by checking the serial number to be all zero. According to the data sheet this is the default value.

But with the most recent procuction lot of boards we find the least significant byte of the serial number to be 0xFF.

Is this a Change of the default value or a test pattern not removed?

Thank You for Support, best regards

Herbert

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7 Replies
SudheeshK
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250 sign-ins First question asked 750 replies posted

Hello Herbert Fleck,

Could you please let us know the top markings of the devices which have this issue?

Thanks and Regards,

Sudheesh

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Anonymous
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Hello Sudheesh,

this is the marking: FM31276-G, A 635221, CYP 1731 THA.

Thank You for Support and Information, regards Herbert

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Anonymous
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Hello Sudheesh,

this is the marking: FM31276-G, A 635221, CYP 1731 THA.

Thank You for Support and Information, regards Herbert

Von: sdhk

Gesendet: Donnerstag, 28. Juni 2018 08:07

An: Herbert Fleck <herbert.fleck@hitel.at>

Betreff: Re: - FM31276 Serial Number Default Values

<http://www.cypress.com>

<https://community.cypress.com/?et=watches.email.thread> Cypress Developer Community

FM31276 Serial Number Default Values

reply from sdhk <https://community.cypress.com/people/sdhk?et=watches.email.thread> in Nonvolatile RAM (F-RAM and nvSRAM) - View the full discussion <https://community.cypress.com/message/161014?et=watches.email.thread#161014>

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Anonymous
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Hello Sudheesh,

I didn’t get any further information on this subject yet but test and delivery are on hold.

Once again, this is the marking of the devices: FM31276-G, A 635221, CYP 1731 THA.

Thank You for Support and Information,

Best regards

Herbert

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SudheeshK
Moderator
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250 sign-ins First question asked 750 replies posted

Hi Herbert,

I am discussing your query internally, could you please provide a picture of the top markings of the failing device?

Thanks and Regards,

Sudheesh

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Anonymous
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Hi Sudhees,

this is the picture You asked for. Thank You for fast processing!

Regards,

Herbert

Von: sdhk

Gesendet: Dienstag, 10. Juli 2018 08:08

An: Herbert Fleck <herbert.fleck@hitel.at>

Betreff: Re: - FM31276 Serial Number Default Values

<http://www.cypress.com>

<https://community.cypress.com/?et=watches.email.thread> Cypress Developer Community

FM31276 Serial Number Default Values

reply from sdhk <https://community.cypress.com/people/sdhk?et=watches.email.thread> in Nonvolatile RAM (F-RAM and nvSRAM) - View the full discussion <https://community.cypress.com/message/162223?et=watches.email.thread#162223>

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SudheeshK
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250 sign-ins First question asked 750 replies posted

Hi Herbert,

We would like to know some more information.

1. Please let us know the source from where you purchased these devices.

2. Please let us know the PO number, or attach invoice (or any shipping details) to this thread.

Thanks and Regards,

Sudheesh

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