Nor Flash Forum Discussions

I am trying to clear (i.e., write to 0x00) the NVDLR register after having programmed it to a previous value.  I did see a post from 2019 that stated that once the NVDLR register is programmed, it cannot be re-programmed.  OK, so that blows up what I originally wanted to do - program and read back different DLP patterns.

However, not being able to re-program does not seem to be totally true.  My original programmed value was 0xAA.  The spec is not clear that I cannot re-program the register (not that I found, anyway), so my attempts to re-program to 0x00 were unsuccessful.  Then someone suggested I try 0xFF.  I was successful doing that.  However, my attempts to get back to 0xAA was unsuccessful.  So, is it more likely that NVDLR bits, once programmed to a '1', cannot be changed?

Thanks!

As of now we are working on the pre-design stage of Access Point. As part of that we are planning to use NOR flash in our project. So please recommend an 8MB NOR flash to us.

Dear Sir/Madam,

We bought S25FL512SAGMFI011, label show date code 2247+, but marking is 2301+(date code YWW, Y =last digit of the year, WW= work week). Here are photos for your reference.  May I know Why date code on label are inconsistent with date code on marking? Is there any document about this?

Hi Team

I recently bought 1 pack of Nor flash #S29AL016J70TFI010. However, I found the Mark on Chip for date code is different from the D/C printed on label. image attached.

I did found an article that seems explained from community.Differentiate 2020 MARK date codes from 2010 MARK date codes for FLASH Memory Products  but I still have 2 questions:

1. so please kindly correct me if I am wrong, the marking on the chips will definitely be LATER than D/C on label, correct? as the D/C in label is so called" Seal date" 

Such as the image: 

Marking on chips: 305BB667--2023, 5th week

D/C on label: 23022304002---2023 2nd/4th week

2. So, the date code on Chips can never be SAME as the one printed on label, correct?

Really appreciated if someone could help ! Thank you in advance！

We received some boxes and found the marking DC is having 1-2wks difference compared to label DC. Pictures attached for your reference.
May I know if this is normal for us to continue use the parts? Thanks.

Need your advice, regarding part no. S29AL016J70TFI020 if you have any document regarding new label format transition from cypress/ spansion to Infineon label
They printed label DC : 2252 while the assemble date code marking shows 2302, if this normal at the assemble process.

Thanks 

Glenn

Dear Teams,

Do you have the input current value in 80 degree C of S25FS512SDSMFB010?

We have check the data sheet, but it only have 25 degree C in typical value.

Thank you.

Boris Su