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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HT45FM2C 데이터시트(PDF) 77 Page - Holtek Semiconductor Inc |
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HT45FM2C 데이터시트(HTML) 77 Page - Holtek Semiconductor Inc |
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77 / 171 page  Rev. 1.10 76 �a� �0� �01� Rev. 1.10 77 �a� �0� �01� HT45FM2C Brushless DC Motor Flash Type 8-Bit MCU HT45FM2C Brushless DC Motor Flash Type 8-Bit MCU Preliminar� Capture Timer Module – CAPTM TheCaptureTimerModuleisatimingunitspecificallyusedforMotorControlpurposes.The CAPTMiscontrolledbyaprogramselectableclocksourceandbythreeinterruptsourcesfromthe motorpositioninghallsensors. Capture Timer Overview AtthecoreoftheCaptureTimerisa16-bitcount-upcounterwhichisdrivenbyauserselectable internalclocksourcewhichissomemultipleofthesystemclockorbythePWM.Thereisalsoan internalcomparatorwhichcomparesthevalueofthis16-bitcounterwithapre-programmed16- bitvaluestoredintworegisters.Therearetwobasicmodesofoperation,aCompareModeand aCaptureMode,eachofwhichcanbeusedtoresettheinternalcounter.Whenacomparematch situationisreachedasignalwillbegeneratedtoresettheinternalcounter.Thecountercanalso beclearedwhenacapturetriggerisgeneratedbythethreeexternalsources,INT0A,INT0Band INT0C. Noise Filter x� Rising/Falling /Double edge Detector Compare Register CAPT�AH /CAPT�AL compare CAPT�CH /CAPT�CL Clear capture counter CLR CapT�_Over CapT�_Cmp INT0A INT0B INT0C CAPS1/CAPS 0 16-bit CAPTM CLK CAPTCK[�:0 ] PW�O fSYS/� fSYS/1�8 fSYS/64 Ha_Int Hb_Int Hc_Int Rising/Falling /Double edge Detector Ha Hb Hc Capture Timer Block Diagram Capture Timer Register Description OveralloperationoftheCaptureTimeriscontrolledusingeightregisters.Areadonlyregisterpair existstostoretheinternalcounter16-bitvalue,whilearead/writeregisterpairexiststostorethe internal16-bitcomparevalue.Anadditionalreadonlyregisterpairisusedtostorethecapturevalue. Theremainingtworegistersarecontrolregisterswhichsetupthedifferentoperatingandcontrol modes. |
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