Accurate timing in deep-sleep

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by Muis on Thu Dec 20 12:27:19 MST 2012
I need to take 256 ADC samples per second, and deep-sleep in between. In the documentation I read that the Watchdog timer (which is used to wakeup from deep sleep), is very inaccurate (40%). Im worried that this will cause a lot of jitter, in other words: that the signal is sampled at irregular intervals.

Is there any way to use deep-sleep, and still wakeup accurately enough to sample at exactly 256 Hz?