Hi there,

We use AMD and Fujitsu mirrorbit Flash chips on our custom board. It works fine with U-Boot since Mirrorbit flash command operations are the same as classical AMD parts.

However few specifications change between classical and mirrorbit flashes :

- Programming time is 100us with mirrorbit (16 us for classical), and because of this : - Mirrorbit allow to write several words in one command (write buffer programming)

If you want full support for Mirrorbit flashes in U-Boot, you have simply to code the write buffering feature. I do not use this, so standard AMD/Fujitsu/ST code is working fine for me.

Frederic Soulier OS engineer Audemat-Aztec, Strasbourg, France

----- Original Message ----- From: "Tom Guilliams" tguilliams@sbs.com To: u-boot-users@lists.sourceforge.net Sent: Tuesday, April 22, 2003 1:22 AM Subject: [U-Boot-Users] AMD MirrorBit FLASH Support?

...

Does anyone know of support for the AMD MirrorBit FLASH parts? For

example,

...

the AM29LV256M - 256MB, x8/x16 data width. There's really not much to change compared to strataflash but I thought I'd ask in case someone's already done it. I don't see anything in the source tree but I could be wrong.

• Tom

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