Am Fr 15. Februar 2008 schrieb Andy Green: > Still for quite a few embedded tasks I2C or LVTTL UART -- > let's not forget USB OTG 12Mbps host from the mini USB B connector -- > will be enough to make a practical solution though. Good point! If i need additional GPIO, so what. I got I2C, so i just chain up some with a dirt cheap chip. The interfacing of the smart battery in GTA01 shouldn't be a big thing this way. Homebrew I2C->GPIO driver, patching GPIO_Bat DEF in src for GTA02 smartbat driver.
So real issue left for some projects is "which power should i use" (especially for those devices that don't do their own power-down). And i wonder whether there will be *good* (near circuit diagram) specs for the connectors. I.E.: *-what kind of OverVoltage-Protection (clamp-diodes etc) / HF-blocking / ground potential..., can i expect behind any external connector. *-What exactly is the impedance (R, C) of headset out, what are the absolute maximum ratings (so i may figure out e.g. whether the headset out makes for a high-quality (HiFi) 1,[EMAIL PROTECTED] line out, or should i plan for a 56R load instead of the standard 10k-50k). *-USB-host power shortcircuit...? Will it blow my battery or whole NEO up in smoke? ;-). *-etc. For questions like these i'm used to refer to a c.diagram. If they are answered verbatim somewhere, i'm fine with it. j _______________________________________________ OpenMoko community mailing list firstname.lastname@example.org http://lists.openmoko.org/mailman/listinfo/community