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HT66F017L Datasheet(PDF) 52 Page - Holtek Semiconductor Inc |
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HT66F017L Datasheet(HTML) 52 Page - Holtek Semiconductor Inc |
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52 / 128 page  Rev. 1.00 5� ���� 0�� �01� Rev. 1.00 5� ���� 0�� �01� HT66F016L/HT66F017L 0.9V Battery Flash A/D Type 8-Bit 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. I/O Register List Register Name Bit 7 6 5 4 3 2 1 0 PAWU D7 D6 D5 D� D� D� D1 D0 PAPU D7 D6 D5 D� D� D� D1 D0 PAC D7 D6 D5 D� D� D� D1 D0 PA D7 D6 D5 D� D� D� D1 D0 PBPU — — — D� D� D� D1 D0 PB — — — D� D� D� D1 D0 PBC — — — D� D� D� D1 D0 PRM PRML� PRML� PRML1 PRML0 PRMS� PRMS� PRMS1 PRMS0 Pull-high Resistors Manyproductapplicationsrequirepull-highresistorsfortheirswitchinputsusuallyrequiringthe useofanexternalresistor.Toeliminatetheneedfortheseexternalresistors,allI/Opins,when configuredasaninputhavethecapabilityofbeingconnectedtoaninternalpull-highresistor.These pull-highresistorsareselectedusingtheregisterPAPUandPBPU,andareimplementedusingweak PMOStransistors. PAPU Register Bit 7 6 5 4 3 2 1 0 Name D7 D6 D5 D� 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 |
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