linux-kernel - Re: MMC: Add 8-bit bus width support

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Date:	Fri, 26 Dec 2008 09:47:21 -0800
From:	David Brownell <david-b@...bell.net>
To:	Jarkko Lavinen <jarkko.lavinen@...ia.com>
Cc:	Pierre Ossman <drzeus-mmc@...eus.cx>,
	lkml <linux-kernel@...r.kernel.org>,
	Ben Dooks <ben-linux@...ff.org>
Subject: Re: MMC: Add 8-bit bus width support

> I am not aware of mmc cards having 8 pins yet.

Transcend seems to have one that's reasonably available;
NewEgg has the 4GB card for $US 9.50, and Transcend sells
it direct too (at least in the US).  I'm a bit curious
what read rates they achieve ... likely not 50 MB/sec!

The relevant search keyword seems to be "MMCplus".

A third use for 8-bit bus widths is the CE-ATA.org stuff
(ATA over MMC) ... I'm not sure how real that is, but the
Seagate website has two "Lyrion" products of 30MB and 60MB
using 8-bit MMC for small disks.  I had thought bigger
drives had been announced (e.g. from Samsung, 200+ MB);
maybe they're visible only through OEM channels.

- Dave

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