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HT66F4530 数据表(PDF) 77 Page - Holtek Semiconductor Inc |
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HT66F4530 数据表(HTML) 77 Page - Holtek Semiconductor Inc |
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77 / 224 page  Rev. 1.00 7� De�e��e� �1� �01� Rev. 1.00 77 De�e��e� �1� �01� HT66F4530/HT66F4540/HT66F4550 A/D Flash MCU with Dual Operational Amplifiers HT66F4530/HT66F4540/HT66F4550 A/D Flash MCU with Dual Operational Amplifiers I/O Port Control Registers EachI/OporthasitsowncontrolregisterknownasPAC~PDC,tocontroltheinput/output configuration.Withthiscontrolregister,eachCMOSoutputorinputcanbereconfigured dynamicallyundersoftwarecontrol.EachpinoftheI/Oportsisdirectlymappedtoabitinits associatedportcontrolregister.FortheI/Opintofunctionasaninput,thecorrespondingbitofthe controlregistermustbewrittenasa"1".Thiswillthenallowthelogicstateoftheinputpintobe directlyreadbyinstructions.Whenthecorrespondingbitofthecontrolregisteriswrittenasa"0", theI/OpinwillbesetupasaCMOSoutput.Ifthepiniscurrentlysetupasanoutput,instructions canstillbeusedtoreadtheoutputregister.However,itshouldbenotedthattheprogramwillinfact onlyreadthestatusoftheoutputdatalatchandnottheactuallogicstatusoftheoutputpin. PxC Register Bit 7 6 5 4 3 2 1 0 Na�e PxC7 PxC� PxC5 PxC4 PxC3 PxC� PxC1 PxC0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 1 1 1 1 1 1 1 1 PxCn:I/OPortxPintypeselection 0:Output 1:Input ThePxCnbitisusedtocontrolthepintypeselection.Herethe"x"canbeA,B,CorD.However, theactualavailablebitsforeachI/OPortmaybedifferent. I/O Port Sink Current Control ThesedevicessupportdifferentsinkcurrentdrivingcapabilityonlyforPB0andPB1pins.Withthe correspondingselectionregister,SKLEDC,thesepinscansupportfourlevelsofthesinkcurrent drivingcapability.UsersshouldrefertotheInput/OutputCharacteristicssectiontoselectthedesired sinkcurrentfordifferentapplications. SKLEDC Register Bit 7 6 5 4 3 2 1 0 Na�e — — — — — — SKLEDC1 SKLEDC0 R/W — — — — — — R/W R/W POR — — — — — — 0 0 Bit7~2 Unimplemented,readas"0" Bit1~0 SKLEDC1~SKLEDC0:PB1~PB0sinkcurrentselection 00:Sinkcurrent=Level0(Min.) 01:Sinkcurrent=Level1 10:Sinkcurrent=Level2 11:Sinkcurrent=Level3(Max.) Note:UsersshouldrefertotheInput/OutputCharacteristicssectiontoobtaintheexact valuefordifferentapplications. |
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