[U-Boot-Users] flash memory access

[Paul McAvoy]

I was using the reference of 256 * 128K sectors from some other demo sorce
code that came with the board.  But after looking at the datasheet for the
device:
http://www.atmel.com/dyn/products/product_card.asp?family_id=624&family_name
=Flash+Memory&part_id=1761

There is no mention of any sectors on the chip, and the only way to
re-program it (apparently) is to re-flash the entire thing.

-p


----- Original Message -----
From: "Wolfgang Denk" <wd at denx.de>
To: "Paul McAvoy" <paulmcav at queda.net>
Cc: <u-boot-users at lists.sourceforge.net>
Sent: Saturday, March 01, 2003 3:16 PM
Subject: Re: [U-Boot-Users] flash memory access


> In message <20030301132517.A14084 at europa.queda.net> you wrote:
> > Hmm.. after more reading, I have found that in order to program _ANY_ of
the
> > flash on my atmel chip the following is the case:
> >
> >  1) the entire chip has to be erased, setting all bits to 1
> >  2) any bytes can be programmed setting the bits to 0
> ...
> > > I have an Atmel chip, 32Megbyts, 256 * 128K sectors.
>
> This makes no sense. If the flash chip has 256  sectors  (aka  "erase
> units"),  you  can  always  erase  each individual sector without any
> influence on the other 255 sectors.
>
> Best regards,
>
> Wolfgang Denk
>
> --
> Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
> Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
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>
>
>