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HT46R003B Datasheet(PDF) 30 Page - Holtek Semiconductor Inc |
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HT46R003B Datasheet(HTML) 30 Page - Holtek Semiconductor Inc |
30 / 76 page Rev. 1.00 30 ��ne 1�� �01� Rev. 1.00 31 ��ne 1�� �01� HT46R003B Cost-Effective A/D 8-bit OTP MCU HT46R003B Cost-Effective A/D 8-bit OTP MCU Input/Output Ports HoltekmicrocontrollersofferconsiderableflexibilityontheirI/Oports.Mostpinscanhaveeitheran inputoroutputdesignationunderuserprogramcontrol.Additionally,astherearepull-highresistors andwake-upsoftwareconfigurations,theuserisprovidedwithanI/Ostructuretomeettheneedsof awiderangeofapplicationpossibilities. 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 PA7 PA6 PA5 PA� PA3 PA� PA1 PA0 PAC PAC7 PAC6 PAC5 PAC� PAC3 PAC� PAC1 PAC0 PAPU — PAPU6 PAPU5 PAPU� PAPU3 PAPU� PAPU1 PAPU0 PAWU PAWU7 PAWU6 PAWU5 PAWU� PAWU3 PAWU� PAWU1 PAWU0 PB — — PB5 PB� PB3 PB� PB1 PB0 PBC — — PBC5 PBC� PBC3 PBC� PBC1 PBC0 PBPU — — PBPU5 PBPU� PBPU3 PBPU� PBPU1 PBPU0 I/O Registers List Pull-high Resistors Manyproductapplicationsrequirepull-highresistorsfortheirswitchinputsusuallyrequiringthe useofanexternalresistor.Toeliminatetheneedfortheseexternalresistors,allI/Opins,when configuredasaninputhavethecapabilityofbeingconnectedtoaninternalpull-highresistor.These pull-highresistorsareselectedusingaregistersPAPUandPBPUlocatedintheDataMemory.The pull-highresistorsareimplementedusingweakPMOStransistors.NotethatpinPA7doesnothave apull-highresistorselection. PAPU Register Bit 7 6 5 4 3 2 1 0 Name — PAPU6 PAPU5 PAPU� 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 Bit7 Unimplemented,readas"0" Bit6~0 PAPU6~PAPU0:PortAbit6~bit0pull-highcontrol 0:Disable 1:Enable |
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