Rockbox.org home
release
dev builds
extras
themes manual
wiki
device status forums
mailing lists
IRC bugs
patches
dev guide



Rockbox mail archive

Subject: RE: ATA - USE_POWEROFF vs USE_SLEEP
From: Nielsen Linus (ext) (Linus.Nielsen_at_elema.siemens.se)
Date: 2002-09-10


> On another note - you mention tri-stating the ATA bus during
> sleep; did you try it with the bus driven (to some idle state)?

I can't drive it, /G is controlled by a chip select signal from the address
decoder in the CPU. And the data direction is controlled by the /RD
signal...

> From what i understand of the ATA interface, the bus remains
> active during sleep. You'd want to tri-state it for power-off,
> but not sleep.

Ok , then it may not be what causes the extra current draw. What could it be
then...?

> Floating CMOS inputs could explain the extra
> current draw.

That's what I have been thinking. But I'm definitely not sure...

/Linus



Page was last modified "Jan 10 2012" The Rockbox Crew
aaa