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GL128S10DH801 Flash gets corrupted after being OK for long time | Cypress Semiconductor

GL128S10DH801 Flash gets corrupted after being OK for long time

Summary: 4 Replies, Latest post by Ahmed SHOKRY on 10 Nov 2016 03:10 AM PST
Verified Answers: 0
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Ahmed SHOKRY's picture
User
3 posts

Hello Community,

I am using GL128S10DH801 flash, to keep SoC code and some application-specific data (to be kept over different power cycles).

Normally, the data are written once at production and is kept const through lifetime of the board.

I've received a returned board from the customer, and upon analysis, I found that the flash is totally corrupted.

From customer claim, the board was functioning perfectly for around 1 year, and now I see flash corruption.

I tried to re-flash the board, but the system stucks at erasing the flash.

There has been no claim that voltage fluctuations happened to the board at any time.

This issue has been reported on this particular board, while no similar issue is seen on other hundreds of boards.

Why do you think a flash corruption may happen after 1 year of happy operation on a particular board, while no write\erase operations are expected and no power fluctuations (over or under voltage) is recorded ?

Any directions on how to think of that ?

Thanks in advance.

Krishna GSNS's picture
Cypress Employee
48 posts

It can be due to exposure od device to radiation example like X-rays etc. It cna also be due to electric fields present in the system.

Thanks,

Krishna.

Ahmed SHOKRY's picture
User
3 posts

Thanks Krishna,

The flash is connected to the SoC through General-Purpose Memory Controller (GPMC).

Does the flash have any settings that when set to marginal values, the flash gets corrupted as described  ?

Is there errata sheet for the part to check it against GPMC settings ?

Krishna GSNS's picture
Cypress Employee
48 posts

Ahmed,

I have checked our internal database and the part GL128S10DHI01 does not have any errata.

Please let us know on how many devices  you are seeing the issue.

Thanks,

Krishna.

Ahmed SHOKRY's picture
User
3 posts

Hi Krishna,

The factory just reported more 5 boards, so that total is 6 boards.

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