SDIO multiplexing

Daniel Willmann daniel at
Thu May 1 23:09:07 CEST 2008

On Thu, 01 May 2008 19:13:24 +0100
Andy Green <andy at> wrote:

> Well it's not that bad at all.  Glamo SD works by setting up the
> transaction to the card, and then Linux goes and does something else
> until it gets an interrupt from the Glamo.  Only then it pulls the
> bulk data out of Glamo RAM.  So during the interrupt the CPU pulls SD
> data; the rest of the time, including while it waits for completion,
> it can do the graphics side.

Still scrolling slows down to a crawl if you copy something from/to SD.

Daniel Willmann
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