Removing Glamo from GTA02 (Was: Welcome)
joerg at openmoko.org
Mon Apr 20 08:29:11 CEST 2009
Am Mo 20. April 2009 schrieb NeilBrown:
> On Mon, April 20, 2009 4:12 am, Rask Ingemann Lambertsen wrote:
> > That leaves g2). We basicly have two options:
> > 1) Use the 2442's unused SPI interface 0 for MMC/SD(HC) cards. Supposedly
> > this can be done. The AR6001 can then remain on the 2442's SDIO interface.
> According to wikipedia (Secure_Digital_card), SPI is optional for
> microSD, so this might not work.
> > 2) Use the 2442's SDIO interface for MMC/SD(HC) cards. The AR6001 will
> > then
> > connect to the unused SPI interface 0 instead. Werner made the latter work
> > and the former works on the GTA01.
> > The SPI interface is slower than the SDIO interface, so which to choose
> > depends on which of MMC/SD(HC) or WLAN you think is most important. I'd go
> > with 2) since with a page-on-demand system, fast disk I/O is needed for
> > low
> > user interface response times and there are already complaints in that
> > area
> > while we have yet to hear anybody complain about slow WLAN (which also
> > isn't
> > used as much?).
> I agree that speed is more important for the SD card than the WLAN,
> so I support your preference for 2.
And, surprisingly enough, that's exactly the way GTA03 was designed.
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