Re:LM3S6965 crashes in hibernate
Unfortunately, we need to come up and react in a few milliseconds, maximum, from low power. We can't wait for even one second for an oscillator to stabilize.
If we use the Luminary part as an Ethernet portal, we can afford to take our time bringing it up, since we are only communicating a few times a day for a few seconds each time. Our application is battery powered, and the sleep and deep sleep mode power draws are right now an order of magnitude higher than our existing small micros. We are currently using Texas Instruments MSP430 parts, but without Ethernet capability, which we want to add.
We currently have a wireless link that uses an MSP430 and a radio module. The Luminary part would essentially replace the radio module. What we were looking at with hibernate was the possibility of replacing the MSP430 with a tiny fraction of the Luminary part's capability, but it appears that the best steady-state low power drain we can expect with that approach is on the order of a couple of milliamps - where the MSP series draws a couple of microamps.
I am taking my current draw numbers from the 6965 data sheet, and rounding up, since my copy states 'pending' in all the maximum columns. I see a typical sleep draw of 21 mA in sleep, and 4.81 mA in deep sleep. Active currents of between 57 and 156 mA are much better than our present radio module, which draws upwards of 600 mA when active, but these levels of draw are still much too high for us to consider the Luminary part as a stand-alone replacement for the MSP430.
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