标签: 故障安全监测

ThisapplicationnotediscussestheFail-SafeMonitoringandClockSwitchingfeaturesonthenew8/14/20-pinFlashmicrocontrollerfamily.ThisnewfamilyofmicrocontrollerstakesMicrochip'sMid-RangeFamilyofproductstothenextlevelwithitsnew8MHzinternaloscillatorthatcanbeswitchedinrealtimefrom8MHzdownto31kHz(8steps).Inaddition,thedevicecontainsafail-safefeaturethatmonitorstheexternal(primary)oscillatorandwillautomaticallyswitchovertotheinternal(secondary)oscillatoriftheprimaryoscillatorfails.Thesenewfeaturesmakeapplicationsmorerobustintheeventofaprimaryoscillatorfailureandallowgreaterflexibilitybyusingtheclockfrequencyswitchingcapabilitiesoftheinternaloscillator.AN892Fail-SafeMonitoringandClockFrequencySwitchingUsingthePIC16F684MONITORINGFORANEXTERNALAuthor:MichaelRyleeOSCILLATORFAILUREMicrochipTechnologyInc.OSCCON(OSTS)indicateswhetherthedeviceisrunningfromtheprimaryorsecondaryoscillator.WhenINTRODUCTIONafailureontheprimaryoscillatorisdetected,theThisapplicationnotediscussestheFail-Safedevi……