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HT45FM2C bảng dữ liệu(PDF) 124 Page - Holtek Semiconductor Inc |
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HT45FM2C bảng dữ liệu(HTML) 124 Page - Holtek Semiconductor Inc |
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124 / 171 page ![]() Rev. 1.10 1�4 �a� �0� �01� Rev. 1.10 1�5 �a� �0� �01� HT45FM2C Brushless DC Motor Flash Type 8-Bit MCU HT45FM2C Brushless DC Motor Flash Type 8-Bit MCU Preliminar� DC Motor Control Thedevicecancontrolmotorsusing1or2pins.TakingtheexampleofDCFanHeadmotorcontrol. a2-pinDCMotorInterfacecancontrolthefanheadmotorspeedanddirection,whilethe1-pinDC MotorInterfacecanonlycontrolthemotorspeed.TheFH_MSbitintheDCMCR1registerisused toselecteithera1-pinor2-pinDCMotorInterface. 2-pin DC Motor Control Inthiscasethe2-pinDCMotorinterfacecancontrolboththemotorspeedanddirection.An externalcircuitusingalimitswitchoraVRcircuitcanbeusedtocontrolthemotordirection.The 10-bitCTMoutputPWMOisusedtoadjustthePWMdutycycletocontrolDCmotorspeed.The DC_MCTLcircuitcontrolstheDCmotordirection. VDDM=5V FH0_SAT FH0_SBT FH0_RI FH0_LI HT45FM2C 10-bit CTM TMR0 PWMO FH0_FR FH0_STOP P P N N L_LSW R_LSW VDDM=5V FH1_SAT FH1_SBT FH1_RI FH1_LI 10-bit CTM TMR1 PWMO FH1_FR FH1_STOP P P N N L_LSW R_LSW DC_MCTL DC_MCTL FH0_PA FH0_PB FH1_PA FH1_PB VDDM=5V VDDM=5V VDDM=5V VDDM=5V FH_MS 0 1 1 0 FH_MS 0 1 1 0 1 1 2-Pin DC Motor Interface Application Circuit TheDCcontrolorderfortheMotordirectionisthatthemotorshouldbefree(FH[0/1]_STOP) beforeforward(FH[0/1]_FR)andthenchangedirection.Itisusedtoadjusttheoutputpolarity accordingtotheexternalgatedriveconfiguration(PtypeorNtype).TheDCFanHeadinterface resetdefaultvalueisFH0_SAT=hi-z/FH0_SBT=hi-zandFH1_SAT=hi-z/FH1_SBT=hi-z. FH[0/1]_STOP FH[0/1]_FR DC_Motor 0 1 Forward 0 0 Backward 1 V Free |
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