Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

NOR Flash Software Read Implementation

Status
Not open for further replies.

ku637

Advanced Member level 4
Joined
Apr 6, 2011
Messages
106
Helped
2
Reputation
4
Reaction score
2
Trophy points
1,298
Activity points
2,392
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
 

FvM

Super Moderator
Staff member
Joined
Jan 22, 2008
Messages
48,798
Helped
14,313
Reputation
28,889
Reaction score
13,046
Trophy points
1,393
Location
Bochum, Germany
Activity points
281,738
Page structure of parallel flash is only relevant for erase and write. Data is simply read word-wise.
 
  • Like
Reactions: ku637

    ku637

    Points: 2
    Helpful Answer Positive Rating

ku637

Advanced Member level 4
Joined
Apr 6, 2011
Messages
106
Helped
2
Reputation
4
Reaction score
2
Trophy points
1,298
Activity points
2,392
Hmm..So then what can be the use of page read cycle shown in datasheets of the device ,any idea?
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top