Werner Almesberger wrote: > That may be because GTA02 has that modem "power switch" (U1705). I > think it can't hurt to route the modem's reset signal to a PMU GPIO, > to make sure it's stable even if we cut power to the CPU.
Modem ON/OFF or RESET? Telit expects ON/OFF to be asserted low for 1 second to activate, so that might be less of a concern than reset (which only needs to be help low for 200ms) Should the modem be powered from VBAT or VB_GSM? I've just noticed that I had assumed the latter, but looking at U1750, VB_GSM is on the battery side of the switch, where VBAT is actually the switched supply. We've also dropped the over current detection (nGSM_OC) in -core, was that intentional? If so, is there any reason to keep R1751, R1753, C1753? All the best, Dave _______________________________________________ gta02-core mailing list [email protected] https://lists.openmoko.org/mailman/listinfo/gta02-core
