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Rockbox mail archiveSubject: RE: ATA - USE_POWEROFF vs USE_SLEEPRE: ATA - USE_POWEROFF vs USE_SLEEP
From: Nielsen Linus (ext) <"Nielsen>
Date: Tue, 10 Sep 2002 13:30:18 +0200 Look at the Recorder schematic, the interface board. It is called T1 and controls the IDE_PWR signal. It is controlled with PA5 (pin 12 on the large connector). /Linus > -----Original Message----- > From: Andrew Jamieson [mailto:ajamiesn_at_optusnet.com.au] > Sent: den 10 september 2002 13:36 > To: rockbox_at_cool.haxx.se > Subject: Re: ATA - USE_POWEROFF vs USE_SLEEP > > > Ahhh .. so you're actually talking about _cutting_ the power > to the HDD, > with a FET switch or such like, yes? Hmmm ... can't see > anything like that > on the schematics (at a cursory examination, looking at > Acrobate with my > head on its side :) - a signal on the VBatt line maybe? I'm > not as clued up > on the smaller IDE interface as perhaps I could be. But it's > not a command > to the HDD that parks the head and cuts the power internally? > I thought it > was the latter. > > If you can confirm that it is a logic signal that does the > power_off, not a > register setting, then I will hunt for such a beast on my > player (new). > > > A > ----- Original Message ----- > From: "Nielsen Linus (ext)" <Linus.Nielsen_at_elema.siemens.se> > To: <rockbox_at_cool.haxx.se> > Sent: Tuesday, September 10, 2002 8:59 PM > Subject: RE: ATA - USE_POWEROFF vs USE_SLEEP > > > > > In the code in ata.c it says poweroff only works on the > > > recorder, not the player. Can anyone confirm this and say why? > > > > At least the older players have no way of controlling the > HD power. I > don't > > know about the newer ones, they don't use the same port pin > at least. > > > > > Anyway, I think Linus has done these measurements already - > > > using the _bad_ poweroff that is undefined in the > > > code already :) > > > > Bad, bad me. Yeah I know that the current POWEROFF feature > is bad, that is > > why we don't use it. :-) > > > > I don't remember the current draw of the various > configurations...just > that > > poweroff was a lot better... > > > > /Linus > Received on 2002-09-10 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |