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HT45F3W Datasheet(PDF) 71 Page - Holtek Semiconductor Inc |
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HT45F3W Datasheet(HTML) 71 Page - Holtek Semiconductor Inc |
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71 / 167 page  Rev. 1.50 70 De�e��e� 01� �01� Rev. 1.50 71 De�e��e� 01� �01� HT45F3W R-Type Blood Pressure Meter Flash MCU HT45F3W R-Type Blood Pressure Meter Flash MCU Input/Output Ports HoltekmicrocontrollersofferconsiderableflexibilityontheirI/Oports.Withtheinputoroutput designationofeverypinfullyunderuserprogramcontrol,pull-highselectionsforallportsand wake-upselectionsoncertainpins,theuserisprovidedwithanI/Ostructuretomeettheneedsofa widerangeofapplicationpossibilities. Thedeviceprovidesbidirectionalinput/outputlineslabeledwithportnamesPA~PD.TheseI/O portsaremappedtotheRAMDataMemorywithspecificaddressesasshownintheSpecialPurpose DataMemorytable.AlloftheseI/Oportscanbeusedforinputandoutputoperations.Forinput operation,theseportsarenon-latching,whichmeanstheinputsmustbereadyattheT2risingedge ofinstruction“MOVA,[m]”,wheremdenotestheportaddress.Foroutputoperation,allthedatais latchedandremainsunchangeduntiltheoutputlatchisrewritten. I/O Register List Register Name Bit 7 6 5 4 3 2 1 0 PAWK PAWK7 PAWK� PAWK5 PAWK4 PAWK3 PAWK� PAWK1 PAWK0 PAPU — PAPU� PAPU5 PAPU4 PAPU3 PAPU� PAPU1 PAPU0 PA PA7 PA� PA5 PA4 PA3 PA� PA1 PA0 PAC PAC7 PAC� PAC5 PAC4 PAC3 PAC� PAC1 PAC0 PBPU — — PBPU5 PBPU4 PBPU3 PBPU� PBPU1 PBPU0 PB — — PB5 PB4 PB3 PB� PB1 PB0 PBC — — PBC5 PBC4 PBC3 PBC� PBC1 PBC0 PCPU — PCPU� PCPU5 PCPU4 PCPU3 PCPU� PCPU1 PCPU0 PC — PC� PC5 PC4 PC3 PC� PC1 PC0 PCC — PCC� PCC5 PCC4 PCC3 PCC� PCC1 PCC0 PDPU PDPU7 PDPU� PDPU5 PDPU4 PDPU3 PDPU� PDPU1 PDPU0 PD PD7 PD� PD5 PD4 PD3 PD� PD1 PD0 PDC PDC7 PDC� PDC5 PDC4 PDC3 PDC� PDC1 PDC0 Pull-high Resistors Manyproductapplicationsrequirepull-highresistorsfortheirswitchinputsusuallyrequiringthe useofanexternalresistor.Toeliminatetheneedfortheseexternalresistors,allI/Opins,when configuredasaninputhavethecapabilityofbeingconnectedtoaninternalpull-highresistor.These pull-highresistorsareselectedusingregistersPAPU~PDPU,andareimplementedusingweak PMOStransistors.NotethatpinPA7doesnothaveapull-highresistorselection. PAPU Register Bit 7 6 5 4 3 2 1 0 Na�e — PAPU� PAPU5 PAPU4 PAPU3 PAPU� PAPU1 PAPU0 R/W — R/W R/W R/W R/W R/W R/W R/W POR — 0 0 0 0 0 0 0 |
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