[Yaffs] Re: YAFFS support for 16bit NAND flash

[adam.charrett@philips.com]

Thanks for the info.
The devices we are using are 512B Pages and 16Byte Spare areas and support
1 rewrite to the spare area.
The possibility I'm looking into is reducing the number of bytes used by
the tags by 1.

Bits
15 15-Bit File ID 32K Files
 2 2bit serial number
18 18Bit Page ID
 9 9Bit counter of the number of bytes (n + 1 ,ie 0 is really 1, as there
is no point in allocating a page for 0 bytes? is there?)
12 12Bit ECC
 0 Unused
56 Total

This would be perfectly acceptable for us, as we don't have a very large
device (64MB max)

Cheers

Adam

-----Original Message-----
From: Wookey [mailto:wookey@aleph1.co.uk]
Sent: 18 Nov 2004 15:34
To: yaffs@stoneboat.aleph1.co.uk
Subject: [Yaffs] Re: YAFFS support for 16bit NAND flash


+++ Reggiani, Adamo [04-11-18 15:18 +0100]:
>
> Hi Adam,
> Yaffs2 should support 16bit Nand flash, and is under development now;
some modifications are already committed to the CVS repository.
> Anyway i think it's trivial to modify the current Yaffs for 16bit
devices.

So long as they allow page-rewriting. Check the spec.

Wookey
--
Aleph One Ltd, Bottisham, CAMBRIDGE, CB5 9BA, UK  Tel +44 (0) 1223 811679
work: http://www.aleph1.co.uk/     play: http://www.chaos.org.uk/~wookey/

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