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Message-ID: <20090727214001.GK12665@console-pimps.org>
Date: Mon, 27 Jul 2009 22:40:01 +0100
From: Matt Fleming <matt@...sole-pimps.org>
To: David Vrabel <david.vrabel@....com>
Cc: Philip Langdale <philipl@...rt.org>,
Andrew Morton <akpm@...ux-foundation.org>, ohad@...cohen.org,
ian@...menth.co.uk, pierre@...man.eu, linux-kernel@...r.kernel.org,
linux-embedded@...r.kernel.org, nico@....org,
nicolas.ferre@....atmel.com, hskinnemoen@...el.com,
tony@...mide.com, david-b@...bell.net, manuel.lauss@...il.com,
mirq-l@...per.es
Subject: Re: New MMC maintainer needed
On Mon, Jul 27, 2009 at 01:09:47PM +0100, David Vrabel wrote:
> Philip Langdale wrote:
> >
> > Both the (Simplified) SD and SDIO specifications do not formally
> > define the 'low voltage' range in the way the MMC spec does. ie: You
> > won't find anything in the SD specs that even tell you what the range
> > is - it just says that it exists.
>
> Standard SD/SDIO cards only support 2.7-3.6V.
>
> 1.8V operation is added in SD physical spec 3.00 and is part of any of
> the UHS-1 modes (SDR12-SDR104 and DDR50). It has a different timings
> and requires a different (3.00 compliant) host controller.
Is the 3.00 spec publicly available?
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