The level detector compares a first reference voltage with a supply voltage provided to the system, and provides output of a first reset signal indicating that {HEAD ~ the controller} is in {TAIL ~ an abnormal state} in dependence upon the comparison between the first reference voltage and the supply voltage 
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The level detector compares a first reference voltage with a supply voltage provided to the system , and provides output of a first reset signal indicating that { HEAD ~ the controller } is in { TAIL ~ an abnormal state } in dependence upon the comparison between the first reference voltage and the supply voltage
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH