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HT45FM2C Datasheet(PDF) 32 Page - Holtek Semiconductor Inc |
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HT45FM2C Datasheet(HTML) 32 Page - Holtek Semiconductor Inc |
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32 / 171 page  Rev. 1.10 �� �a� �0� �01� Rev. 1.10 �� �a� �0� �01� HT45FM2C Brushless DC Motor Flash Type 8-Bit MCU HT45FM2C Brushless DC Motor Flash Type 8-Bit MCU Preliminar� EEC Register Bit 7 6 5 4 3 2 1 0 Name — — — — WREN WR RDEN RD R/W — — — — R/W R/W R/W R/W POR — — — — 0 0 0 0 Bit7~4 Undefined,readas“0” Bit 3 WREN: DataEEPROMWriteEnable 0:Disable 1:Enable ThisistheDataEEPROMWriteEnableBitwhichmustbesethighbeforeData EEPROMwriteoperationsarecarriedout.ClearingthisbittozerowillinhibitData EEPROMwriteoperations. Bit 2 WR: EEPROMWriteControl 0:Writecyclehasfinished 1:Activateawritecycle ThisistheDataEEPROMWriteControlBitandwhensethighbytheapplication programwillactivateawritecycle.Thisbitwillbeautomaticallyresettozerobythe hardwareafterthewritecyclehasfinished.Settingthisbithighwillhavenoeffectif theWRENhasnotfirstbeensethigh. Bit 1 RDEN: DataEEPROMReadEnable 0: Disable 1: Enable ThisistheDataEEPROMReadEnableBitwhichmustbesethighbeforeData EEPROMread operationsarecarriedout.ClearingthisbittozerowillinhibitData EEPROMreadoperations. Bit 0 RD :EEPROMReadControl 0:Readcyclehasfinished 1:Activateareadcycle ThisistheDataEEPROMReadControlBitandwhensethighbytheapplication programwill activateareadcycle.Thisbitwillbeautomaticallyresettozerobythe hardwareaftertheread cyclehasfinished.Settingthisbithighwillhavenoeffectif theRDENhasnotfirstbeenset high. Note:TheWREN,WR,RDENandRDcannotbesetto“1”atthesametimeinoneinstruction.The WRandRDcannotbesetto“1”atthesametime. Reading Data from the EEPROM ToreaddatafromtheEEPROM,thereadenablebit,RDEN,intheEECregistermustfirstbeset hightoenablethereadfunction.TheEEPROMaddressofthedatatobereadmustthenbeplaced intheEEAregister.IftheRDbitintheEECregisterisnowsethigh,areadcyclewillbeinitiated. SettingtheRDbithighwillnotinitiateareadoperationiftheRDENbithasnotbeenset.When thereadcycleterminates,theRDbitwillbeautomaticallyclearedtozero,afterwhichthedatacan bereadfromtheEEDregister.ThedatawillremainintheEEDregisteruntilanotherreadorwrite operationisexecuted.TheapplicationprogramcanpolltheRDbittodeterminewhenthedatais validforreading. |
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