Andy Green schrieb: > Somebody in the thread at some point said: > > |> Could we use the debug port for this ? > > | :) :) :) > | VERY GOOD idea!!! :) > | Ok, this one will work for sure, I'll keep an eye on it. > | > | Having a 1.Xmm coax power connector on the outside to allow for everyday > | regular use with *very* usual off-the-shelf power adapters is a > | different thing, that's to be decided upon by product *design* (Sean_M-P > | in the end?). I like the idea, but seems there's not much support from > | anybody else. Nevermind. > > Standing orders are to make stuff simpler, less connectors (er... except > debug) less everything, more function. So the debug USB port for power > idea goes well there, although the confusion aspect is increased if > people use both connectors routinely.
Yea, but "keep it simple" not exactly means you have to open the case to insert a connector to debug port (now GTA04 can't lie flat on desk anymore, because debug is on backside), just to apply power when sth like a WiFi stick, USB-memstick, USB-drive... etc is connected to GTA. Also for "less [connectors|*]": we completely get rid of the annoying Y-cable issue with a convenient power concept that's not blocking USB. We don't need to supply any proprietary USB-charger (47k) any more. Thats -2 vendor specific built-to-order (=expensive) items we have to throw into the accessory bag, instead we add one dirt cheap standard 5V-supply for every country where we are allowed to go without USB-charger :-) (there were rumors about China just allows USB, nothing else) Less connectors doesn't mean it's going to be simpler then - obviously. Nor will it be more economic in all cases, nor more convenient. Confusion of end-user by 2 identical connectors, one of them, the really hard to find one, for (virtually everyday) power for host mode and useful for nothing else but (highly sophisticated) debug, the other for power *only* when not in OTG-mode, but you can do everything else with it... :-/ My 0.02EUR: A no-go, a no-NO-go. The appeal of simplicity of a coax power connector you probably find 10000 times more "chargers" for it everywhere in he world than for USB (e.g. my old nokia charger), you simply can't beat that. > The pcf50633 also has this "adapter" concept that we should look at > deploying for debug USB power input, it's not used in GTA02, that'd be > pretty neat. Yep, but know what: I just can't find it anymore, anywhere in the datasheets (50633|50606), in circuit diagrams of GTA01/02... nowhere :-( Already started to doubt my own memory. Wasn't there a ting like 'charging 1A only via power-adapter, USB can only do 500mA'??? Some FET aso? Swear I seen this some months ago... Anyway, we may hook up as many power rails as we like, just decoupling them and testing individually (A/D) for voltage. cheers jOERG _______________________________________________ hardware mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/hardware
