Am Mo 25. August 2008 schrieb Andy Green: > Somebody in the thread at some point said: > | Am Mo 25. August 2008 schrieb Andy Green: > |> Point taken about the GTA03+ module though -- it should take care of > |> power switching inside the module boundary in a reliable way or the > |> module is broken, so we presumably should be able to just use the module > |> boundary power arrangements. But still I guess we learn about it during > |> GTA03 EVB. There was that guy who saw his GTA02 battery consumption was > |> stuck at 500mA on VB when he made no call, I really did not like to hear > |> about it since only the GSM side TX stuff gets that hungry and it seemed > |> there to be doing its own thing. > | > | 100% ACK about scariness of story. > | Though this wasn't exactly for GSM-powerdown state IIRC. So it seems our > | biggest problem these days (for GTA02 GSM at least) is serial > communication > | between CPU and calypso, including not resuming at all, unsolicited > resume > | etc pp. > | A hung call wouldn't seem impossible to me. > > Yeah. The GSM side is so autonomous in power and intelligence it really > can do its own thing. If the CPU doesn't succeed to take down the call > through broken UART on resume or whatever than this is what you would > see as you say. > > It's a pity I didn't ask him to watch consumption when he was quiet and > not handling the phone. He said that it chewed through some large chunk > of his battery when idle in this state, so the current was real, and a > reboot made that symptom go away.
Also enabling GPRS and some stale protocol or runaway app causing continuous retransmits would show same symptoms. /jOERG
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