On Thu, 15 Nov 2001, Benny Sj�strand wrote: > > One issue, IIRC, is that while asleep the sa1110 still gets timer > > interrupts, maybe it's not the timer interrupt - the "alarm" that can wake > > up the device at a particular time, but it's not an alarm. so the sa1110 > > is constantly waking up and going back to sleep.
No, you're confused between IDLE and SLEEP modes. > In released Compaq spec on page 2 "Aditional feutures built into SA-1110 > chipset" it says something about "Four general purpose interruptible > timers" sounds interesting, i did not found any information about those > can be used ? Or is it in the SA1110 Developers Manual, something > integrated in the SA1110 that is something that i don't have any knowledge > about. But I will check that now. It's part of the SA1110. See the OSCR and OSMR registers. > However there's a external timer controller that are running the SA1110 > will only wakup on programed interrupt source set in the PWER register and > it's only set to GPIO1 that is the Power button on the iPAQ. So it will > not wakeup however a timer is running. No timer can run while in sleep mode. Only GPIOs and the RTC alarm can wake up the CPU. > But if it's true that there is a timer running during sleep it should be > turned off to save power. Timers are simply not powered in sleep mode. The RTC is and I doubt you can nor would shut it off. Nicolas _______________________________________________ http://lists.arm.linux.org.uk/mailman/listinfo/linux-arm Please visit the above address for information on this list.
