Freerunner will be GTA02v5 or GTA02v6? (was: Fwd: Future Button and LED software spec)
Flemming Richter Mikkelsen
quatrox at gmail.com
Fri Apr 18 20:21:29 CEST 2008
On 4/18/08, Andy Green <andy at openmoko.com> wrote:
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> Somebody in the thread at some point said:
> | I'm re-posting here some mails from the openmoko-devel "Future Button
> | and LED software spec" thread  in which there are some infos about
> | Freerunner hardware that I think they should be more visible.
> | Summarizing, they say that the GTA02v6 hardware version fixes an
> | hardware bug that causes the LEDs to use about 150mW instead of 25mW.
> Yeah, but how often are the LEDs lit in normal operation: ~0.
As written in the dev list, the problem is with the transistors:
*Shawn Rutledge wrote:
> But GTA02v5 is not going to ship is it?*
*Last thing I've heard, the first units will be GTA02v5 *
*Fortunately, these power-draining LEDs (well, it's the transistors
really) are the only major issue we fixed between v5 and v6. There
are a few smaller improvements, mainly shaving off a mW of suspend
power consumption here and there.*
It was not easy to find any details, but it was mentioned something about a
*From: Werner Almesberger <werner at ...>
Subject: Re: Future Button and LED software spec
Date: 2008-04-17 15:50:07 GMT (1 day, 2 hours and 8 minutes ago)*
> @Werner: do you know - or can you figure out - how many GTA02v5 will leave
> the factory and reach the customers?*
*I've heard something like "thousands". However, I've also heard that
there'll be some sort of fix for the LED problem in these GTA02v5.
Perhaps the dual transistor for the dual LED has been replaced with a
pack with built-in register. I'll probably hear more about this in the
*> And how will it be possible to find out what revision it is without
> it on?*
*I don't know if there will be any easily visible labels or such. I
know it's printed quite clearly on the PCB *
It sounds to me as the problem is easy for those of us that knows a little
electronics. If I get one that leaks current, I will start soldering!
Does anybody know if the fix Werner is talking about, will be done for all
GTA02v5 PCB's? If it really will be a fix for it, it will not be any problem
Please don't send me Word or PowerPoint attachments. See
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