Continuousbuilt-ininterconnectionfailureandcalibrationmemoryparitydetectionAdetectedfailureforcestheoutputsignalclosetogroundlevel,outsidethenormaloutputrangeExternallyactivatedselftesteitherbyaseparateon-offcommandontheselftestinput,orthroughtheSPI.Theself-testgeneratesanelectrostaticforce,deflectingthesensingelement sproofmass,thuscheckingthecompletesignalpathSensingelementmovementcheckASICsignalpathcheckPCBsignalpathcheckuControllerA/DandsignalpathcheckThecreateddeflectioncanbeseenbothintheSPIandanalogueoutput