ETIC 2230 Guia do Utilizador descarregar pdf (Página 61)

Rev. 1.10 60 November 14, 2014 Rev. 1.10 61 November 14, 2014

HT66FW2230

Wireless Charger A/D Flash 8-Bit MCU

Compact Type TM – CTM

AlthoughthesimplestformofthetwoTMtypes,theCompactTMtypestillcontainsthreeoperating

modes,whichareCompareMatchOutput,Timer/EventCounterandPWMOutputmodes.The

CompactTMcanalsobecontrolledwithanexternalinputpinandcandrivetwoexternaloutput

pins.Thesetwoexternaloutputpinscanbethesamesignalortheinversesignal.

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Compact Type TM Block Diagram (n=1)

Compact TM Operation

Atitscoreisa10-bitcount-upcounterwhichisdrivenbyauserselectableinternalorexternalclock

source.Therearealsotwointernalcomparatorswiththenames,ComparatorAandComparator

P.ThesecomparatorswillcomparethevalueinthecounterwithCCRPandCCRAregisters.The

CCRPisthreebitswidewhosevalueiscomparedwiththehighestthreebitsinthecounterwhilethe

CCRAisthetenbitsandthereforecompareswithallcounterbits.

Theonlywayofchangingthevalueofthe10-bitcounterusingtheapplicationprogram,isto

clearthecounterbychangingtheT1ONbitfromlowtohigh.Thecounterwillalsobecleared

automaticallybyacounteroveroworacomparematchwithoneofitsassociatedcomparators.

Whentheseconditionsoccur,aTMinterruptsignalwillalsousuallybegenerated.TheCompact

TypeTMcanoperateinanumberofdifferentoperationalmodes,canbedrivenbydifferentclock

sourcesincludinganinputpinandcanalsocontrolanoutputpin.Alloperatingsetupconditionsare

selectedusingrelevantinternalregisters.

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