General-purposetimers(TIMx)Thereareupto4synchronizablegeneral-purposetimers(TIM2,TIM3,TIM4andTIM5)embeddedintheSTM32F103xC,STM32F103xDandSTM32F103xEperformancelinedevices.Thesetimersarebasedona16-bitauto-reloadup/downcounter,a16-bitprescalerandfeature4independentchannelseachforinputcapture/outputcompare,PWMorone-pulsemodeoutput.Thisgivesupto16inputcaptures/outputcompares/PWMsonthelargestpackages.Thegeneral-purposetimerscanworktogetherwiththeadvanced-controltimerviatheTimerLinkfeatureforsynchronizationoreventchaining.Theircountercanbefrozenindebugmode.Anyofthegeneral-purposetimerscanbeusedtogeneratePWMoutputs.Theyallh***eindependentDMArequestgeneration.Thesetimersarecapableofhandlingquadrature(incremental)encodersignalsandthedigitaloutputsfrom1to3hall-effectsensors.BasictimersTIM6andTIM7ThesetimersaremainlyusedforDACtriggergeneration.Theycanalsobeusedasageneric16-bittimebase.IndependentwatchdogTheindependentwatchdogisbasedona12-bitdowncounterand8-bitprescaler.Itisclockedfromanindependent40kHzinternalRCandasitoperatesindependentlyfromthemainclock,itcanoperateinStopandStandbymodes.Itcanbeusedeitherasawatchdogtoresetthedevicewhenaproblemoccurs,orasafreerunningtimerforapplicationtimeoutmanagement.Itisha***areorsoftwareconfigurablethroughtheoptionbytes.Thecountercanbefrozenindebugmode.WindowwatchdogThewindowwatchdogisbasedona7-bitdowncounterthatcanbesetasfreerunning.Itcanbeusedasawatchdogtoresetthedevicewhenaproblemoccurs.Itisclockedfromthemainclock.Ithasanearlywarninginterruptcapabilityandthecountercanbefrozenindebugmode.SysTicktimerThistimerisdedicatedtoreal-timeoperatingsystems,butcouldalsobeusedasastandarddowncounter.Itfeatures:●A24-bitdowncounter●Autoreloadcapability●Maskablesysteminterruptgenerationwhenthecounterreaches0.●Programmableclocksource)