Well, micheal will get back in town and I will go visit him on Thursday.
Since I don't know a volt from an ohm, he will do the testing. ( I do, but he is the better man for the job) The biggest issue is not me getting a charged battery. The big issue is how does the total system respond when you drain the battery to dead zero and then jack it in? Steve -----Original Message----- From: Werner Almesberger [mailto:[EMAIL PROTECTED] Sent: Sunday, June 22, 2008 1:39 PM To: Andy Green Cc: Joerg Reisenweber; openmoko-kernel@lists.openmoko.org; Sean McNeil; steve Subject: Re: My Gta02s wont charge Andy Green wrote: > This will also solve the "no charging when PMU left on its own if > charger off was the last order" issue as a side effect. That's one of the things I'm not convinced about. If the PMU manual is to be believed, there's no active current path to the battery or Vsys in that state. Furthermore, if the battery is below the Vsys detection threshold voltage, Vth(sysmin) = 2.5V, and there is no other current path to Vsys, the system shouldn't come up for whatever reason. Heh, just tried that setup, and this time it really didn't come up when I plugged in USB. Finally something works as expected ;-) There's the procedure: - make sure MBCC1.chgena isn't set (e.g., disconnect USB, power up, then remove the battery) - discharge a battery through a resistor until the internal protection circuit cuts it off. This happens around 2.5V with GTA02 batteries, 2.2V with GTA01 batteries. - insert the battery - plug in USB Steve, can you please measure the voltage of your "dead" battery ? Steve, if your battery reads 0V, there's something you could try: - find a power source that delivers roughly 4-5V - briefly (for a second or so), connect that power source to the battery, such that + connects to + and - to -, i.e., like jump-starting a car. With a little luck, this little jolt will have convinced the protection circuit that the battery can stand some more use, and the battery will now deliver >2.5V, enough to bring up the Neo and charge from USB. - Werner