ku637
Advanced Member level 4
Hi i have a parallel 16bit NOR flash device implemented in a project unfortunately it is getting obsolete.
I want to replace it with a similar device. I don't know much information about the code currently running on the board.
While comparing the nearest part i could find, i understand that the page size for each is
o JS28F128M29EWHF - 8 words/16 bytes (original part)
o MT28EW128ABA1HJS-0SIT - 16 words/32 bytes. (replacement part considered)
Both are 128Mb density devices, with uniform 128KB block size.
With 16 bytes page size i understand there must be total 1024K pages and in one block 8K pages should be there.
With 32 bytes page size i understand there must be total 512K pages and in one block 4K pages should be there.
So i feel if NOR Flash software design is having page reads, there can be a chance of problems , but if only byte read is there there should not be a problem.Typically NOR flash software is implemented in byte read or page read any idea ? if its used for initial boot?
Or any thoughts on this subject that might guide me will be helpful.
Thanks,
K
I want to replace it with a similar device. I don't know much information about the code currently running on the board.
While comparing the nearest part i could find, i understand that the page size for each is
o JS28F128M29EWHF - 8 words/16 bytes (original part)
o MT28EW128ABA1HJS-0SIT - 16 words/32 bytes. (replacement part considered)
Both are 128Mb density devices, with uniform 128KB block size.
With 16 bytes page size i understand there must be total 1024K pages and in one block 8K pages should be there.
With 32 bytes page size i understand there must be total 512K pages and in one block 4K pages should be there.
So i feel if NOR Flash software design is having page reads, there can be a chance of problems , but if only byte read is there there should not be a problem.Typically NOR flash software is implemented in byte read or page read any idea ? if its used for initial boot?
Or any thoughts on this subject that might guide me will be helpful.
Thanks,
K