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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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HT46R003B bảng dữ liệu(PDF) 32 Page - Holtek Semiconductor Inc |
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HT46R003B bảng dữ liệu(HTML) 32 Page - Holtek Semiconductor Inc |
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32 / 76 page  Rev. 1.00 3� ��ne 1�� �01� Rev. 1.00 33 ��ne 1�� �01� HT46R003B Cost-Effective A/D 8-bit OTP MCU HT46R003B Cost-Effective A/D 8-bit OTP MCU PBC Register Bit 7 6 5 4 3 2 1 0 Name — — PBC5 PBC� PBC3 PBC� PBC1 PBC0 R/W — — R/W R/W R/W R/W R/W R/W POR — — 1 1 1 1 1 1 Bit7~6 Unimplemented,readas"0" Bit5~0 PBC5~PBC0:PortBbit5~bit0Input/Outputcontrol 0:Output 1:Input Pin-shared Functions Theflexibilityofthemicrocontrollerrangeisgreatlyenhancedbytheuseofpinsthathavemore thanonefunction.Limitednumbersofpinscanforceseriousdesignconstraintsondesignersbutby supplyingpinswithmulti-functions,manyofthesedifficultiescanbeovercome.Forsomepins,the chosenfunctionofthemulti-functionI/Opinsissetbyapplicationprogramcontrol. • ExternalInterruptInput Theexternalinterruptpin,INT,ispin-sharedwithanI/Opin.Tousethepinasanexternal interruptinputthecorrectbitsintheINTC0registermustbeprogrammed.Thepinmustalsobe setasaninputbysettingthePAC6bitinthePortControlRegister.Apull-highresistorcanalso beselectedviatheappropriateportpull-highresistorregister.Notethatevenifthepinissetasan externalinterruptinputtheI/Ofunctionstillremains. • ExternalTimer/EventCounterInput TheTimer/EventCounterpinTMRispin-sharedwithI/OpinsForthissharedpintobeused asTimer/EventCounterinput,theTimer/EventCountermustbeconfiguredtobeintheEvent CounterorPulseWidthCaptureMode.Thisisachievedbysettingtheappropriatebitsinthe Timer/EventCounterControlRegister.Thepinmustalsobesetasinputbysettingtheappropriate bitinthePortControlRegister.Pull-highresistoroptionscanalsobeselectedusingtheport pull-highresistorregisters.NotethatevenifthepinissetasanexternaltimerinputtheI/O functionstillremains. • PFDOutput ThePFDfunctionoutputispin-sharedwithanI/Opin.Theoutputfunctionofthispinischosen usingtheCTRL0register.Notethatthecorrespondingbitoftheportcontrolregistermustbe setthepinasanoutputtoenablethePFDoutput.Iftheportcontrolregisterhassetthepinasan input,thenthepinwillfunctionasanormallogicinputwiththeusualpull-highselection,evenif thePFDfunctionhasbeenselected. • PWMOutput ForthedevicethePWMfunctionisincluded.ThePWMfunctionwhoseoutputsarepin-shared withI/Opins.ThePWMoutputfunctionsarechosenusingtheCTRL0register.Notethatthe correspondingbitoftheportcontrolregisters,fortheoutputpin,mustsetupthepinasanoutput toenablethePWMoutput.Ifthepinsaresetupasinputs,thenthepinwillfunctionasanormal logicinputwiththeusualpull-highselections,evenifthePWMregistershaveenabledthePWM function. |
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