Re: NAND vs NOR Flashs?

Re: NAND vs NOR Flashs?

[Thomas Gleixner]

On Tuesday, 14. May 2002 10:09, Subhash Chandra wrote:
> Hi,
>
> I would like to know the diff. between NAND and NOR flash types.
> Any pointers are appreciated.
http://www.linux-mtd.infradead.org/tech/nand.html

-- 
Thomas
___________________________________
autronix automation GmbH
http://www.autronix.de gleixner@autronix.de>

NAND vs NOR Flashs?

[Subhash Chandra]

Hi,

I would like to know the diff. between NAND and NOR flash types.
Any pointers are appreciated.

regards,
Subhash.

Re: NAND vs NOR Flashs?

[Jim Zeus]

--- "Subhash Chandra" <schandra@sasken.com> wrote:
>Hi,
>
>I would like to know the diff. between NAND and NOR flash types.
>Any pointers are appreciated.

The size of NAND flash (8-128M)is always bigger than NOR flash (1-16M);
Reading a NOR flash is a little faster than NAND flash;
Erasing and Writing a NAND flash is much faster than NOR flash;
So NAND flash is more fit for storing data and NOR flash is more fit for storing code.
And there is ECC (error correction) in NAND flash.
You can access NOR flash with SRAM interface and you have to do it with I/O port to NAND flash.
Those are some of the differences between NAND and NOR flash.


Jim Zeus



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Re: NAND vs NOR Flashs?

[Steven J. Hill]

Jim Zeus wrote:
>>I would like to know the diff. between NAND and NOR flash types.
>>Any pointers are appreciated.
> 
> 
> The size of NAND flash (8-128M)is always bigger than NOR flash (1-16M);
> Reading a NOR flash is a little faster than NAND flash;
> Erasing and Writing a NAND flash is much faster than NOR flash;
> So NAND flash is more fit for storing data and NOR flash is more fit for storing code.
> And there is ECC (error correction) in NAND flash.
> You can access NOR flash with SRAM interface and you have to do it with I/O port to NAND flash.
> Those are some of the differences between NAND and NOR flash.
> 
> 
That's some of it. Read the post I had from a while back:

http://lists.infradead.org/pipermail/linux-mtd/2000-October/001270.html

-Steve