Hi all, I'm beginning to get curious about power-consumption on 2103 and 2148 series. It's unclear to me from the UM if the watchdog runs in both idle and power down modes. It looks like it initialtes a 'real' reset, so it must be able to wake the part out of power down, but obviously only if it's clock is running. I've got some mote-stuff on AVR I'd like to try moving to LPC, but you really need to get the sleep down to 10uA for it to be effective, and be able to wake up without power-hungry external devices. The AVR uses the watchdog to wake up from 10uA sleep. Also, the datasheet I have from novermber is filled with "tbd"'s for all the power consumption specs, so if anyone has hard data, that would be appreciated. Can the 2148 come out of power-down from the rtc? It doesn't appear to do a 'hard' reset like the watchdog, so probably not? I see that the rtc on the 2103 will, in fact, wake from power-down, so maybe I'm worng about the 2148. Anyone else implemented a battery powered system that mostly sleeps in an LPC? Pitfalls? Thanks, Steve
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power & sleep
2006-04-05 by Steve Franks
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