From: Paul McAvoy <paulmcav@queda.net>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] flash memory access
Date: Sat, 1 Mar 2003 17:12:12 -0800 [thread overview]
Message-ID: <000901c2e058$c149ac50$1400a8c0@bodhi> (raw)
In-Reply-To: 20030301231629.8E51FC6E0C@atlas.denx.de
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@denx.de>
To: "Paul McAvoy" <paulmcav@queda.net>
Cc: <u-boot-users@lists.sourceforge.net>
Sent: Saturday, March 01, 2003 3:16 PM
Subject: Re: [U-Boot-Users] flash memory access
> In message <20030301132517.A14084@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
> Niklaus Wirth has lamented that, whereas Europeans pronounce his name
> correctly (Ni-klows Virt), Americans invariably mangle it into (Nick-
> les Worth). Which is to say that Europeans call him by name, but
> Americans call him by value.
>
>
>
next prev parent reply other threads:[~2003-03-02 1:12 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-01 19:42 [U-Boot-Users] flash memory access Paul McAvoy
2003-03-01 21:25 ` Paul McAvoy
2003-03-01 23:16 ` Wolfgang Denk
2003-03-02 1:12 ` Paul McAvoy [this message]
2003-03-02 6:49 ` Reinhard Meyer
2003-03-02 9:38 ` Wolfgang Denk
2003-03-02 18:45 ` Paul McAvoy
2003-03-02 19:38 ` Reinhard Meyer
2003-03-02 19:50 ` Paul McAvoy
2003-03-02 20:30 ` Reinhard Meyer
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