使用Microchip的超低功耗唤醒模块

Thisapplicationnotedescribeswaystoreducesystem

currentconsumptionwiththeuseoftheUltra

Low-powerWake-up(ULPWU)module.The

PIC16F684andPIC16F88Xareexamplesofdevices

withthisfeature.

TheprimaryuseofthismoduleisasanULPWUtimer,

butitsfunctionalitycanbeexpandedtofunctionasa

temperaturesensorand/oralow-voltagedetector.The

mainandexpandedfunctionsofthismoduleare

explainedinthisdocument.

Manylow-powerapplicationsrequirethatthe

microprocessorwake-upfromaSleepstateona

periodicbasistocheckthestatusofsomesignal.Itcan

thenreactbasedonameasurementofthatsignaland

gobacktoSleepuntilthenexttimedwake-up.Thisis

awidelyusedmethodforreducingoverallsystemAN879UsingtheMicrochipUltraLow-PowerWake-UpModulecurrentconsumption.ThesetypesofapplicationsAuthors:RuanLourensrequirealow-powerperiodicwake-upandcanbeJoseBenevidesaccomplishedbyactivatingalow-powertimerpriortoJonathanDillonplacingthedeviceinaSleepmode.Uponrollover,theMicrochipTechnologyInc.timerinterruptcanthenwake-upthepartaftersome