Hi, I would be using M4 for time critical events and also as external device safety check for one of my application. A9 will be used as application development. So my question is, if A9 crashes or hangs and reboot through exception handler, I don't want M4 to under reboot. Since A9 is master and all power rails are under A9 control, is it possible to separate out M4 power from A9 linux or from A9 uboot?