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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT45F4M датащи(PDF) 49 Page - Holtek Semiconductor Inc |
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HT45F4M датащи(HTML) 49 Page - Holtek Semiconductor Inc |
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49 / 138 page  Rev. 1.10 48 �an�a�� 1�� �01� Rev. 1.10 49 �an�a�� 1�� �01� HT45F4M Lithium Battery Backup Power ASSP MCU HT45F4M Lithium Battery Backup Power ASSP MCU Input/Output Ports HoltekmicrocontrollersofferconsiderableflexibilityontheirI/Oports.Withtheinputoroutput designationofeverypinfullyunderuserprogramcontrol,pull-highselectionsforallportsand wake-upselectionsoncertainpins,theuserisprovidedwithanI/Ostructuretomeettheneedsofa widerangeofapplicationpossibilities. Thedeviceprovidesbidirectionalinput/outputlineslabeledwithportnamesPAandPB.TheseI/O portsaremappedtotheRAMDataMemorywithspecificaddressesasshownintheSpecialPurpose DataMemorytable.AlloftheseI/Oportscanbeusedforinputandoutputoperations.Forinput operation,theseportsarenon-latching,whichmeanstheinputsmustbereadyattheT2risingedge ofinstruction“MOVA,[m]”,wheremdenotestheportaddress.Foroutputoperation,allthedatais latchedandremainsunchangeduntiltheoutputlatchisrewritten. Register Name Bit 7 6 5 4 3 2 1 0 PA D7 D6 D� D4 D� D� D1 D0 PAC D7 D6 D� D4 D� D� D1 D0 PAPU D7 D6 D� D4 D� D� D1 D0 PAWU D7 D6 D� D4 D� D� D1 D0 PB D7 D6 D� D4 D� D� D1 D0 PBC D7 D6 D� D4 D� D� D1 D0 PBPU D7 D6 D� D4 D� D� D1 D0 Pull-high Resistors Manyproductapplicationsrequirepull-highresistorsfortheirswitchinputsusuallyrequiringthe useofanexternalresistor.Toeliminatetheneedfortheseexternalresistors,allI/Opins,when configuredasaninputhavethecapabilityofbeingconnectedtoaninternalpull-highresistor.These pull-highresistorsareselectedusingregistersPAPU~PBPU,andareimplementedusingweak PMOStransistors. PAPU Register Bit 7 6 5 4 3 2 1 0 Name D7 D6 D� D4 D� D� D1 D0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit7~0 I/OPortAbit7~bit0Pull-HighControl 0:Disable 1:Enable PBPU Register Bit 7 6 5 4 3 2 1 0 Name D7 D6 D� D4 D� D� D1 D0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit7~0 I/OPortBbit7~bit0Pull-HighControl 0:Disable 1:Enable |
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