HT66F4530 datasheet(87/224 Pages) HOLTEK

87 / 224 page

Rev. 1.00

8�

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Rev. 1.00

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HT66F4530/HT66F4540/HT66F4550

A/D Flash MCU with Dual Operational Amplifiers

HT66F4530/HT66F4540/HT66F4550

A/D Flash MCU with Dual Operational Amplifiers

Bit1~0

IFS1~IFS0:RXinputsourcepinselection

00:PB6

01:PA0

10:PA5

11:PB6

Note:IntheSPIMastermode,thePA3andPC0pinseachcanbeusedastheSCSpinafter

SIMEN=1andCSEN=1andareindependentoftheIFS[5:4]bits,whilethePA4andPD0pins

eachcanbeusedastheSCKpinafterSIMEN=1andareindependentoftheIFS[3:2]bits.

I/O Pin Structures

TheaccompanyingdiagramillustratestheinternalstructuresoftheI/Ologicfunction.Astheexact

logicalconstructionoftheI/Opinwilldifferfromthisdiagram,itissuppliedasaguideonlyto

assistwiththefunctionalunderstandingofthelogicfunctionI/Opins.Thewiderangeofpin-shared

structuresdoesnotpermitalltypestobeshown.

VDD

Cont�ol Bit

Data Bit

Data Bus

W�ite Cont�ol Registe�

Chip Reset

Read Cont�ol Registe�

Read Data Registe�

W�ite Data Registe�

Syste� Wake-up

wake-up Sele�t PA only

I/O pin

Weak

Pull-up

Pull-high

Registe�

Sele�t

Logic Function Input/Output Structure

Programming Considerations

Withintheuserprogram,oneofthefirstthingstoconsiderisportinitialisation.Afterareset,all

oftheI/Odataandportcontrolregisterswillbesethigh.ThismeansthatallI/Opinswilldefault

toaninputstate,thelevelofwhichdependsontheotherconnectedcircuitryandwhetherpull-

highselectionshavebeenchosen.Iftheportcontrolregistersarethenprogrammedtosetupsome

pinsasoutputs,theseoutputpinswillhaveaninitialhighoutputvalueunlesstheassociatedport

dataregistersarefirstprogrammed.Selectingwhichpinsareinputsandwhichareoutputscanbe

achievedbyte-widebyloadingthecorrectvaluesintotheappropriateportcontrolregisterorby

programmingindividualbitsintheportcontrolregisterusingthe"SET[m].i"and"CLR[m].i"

instructions.Notethatwhenusingthesebitcontrolinstructions,aread-modify-writeoperationtakes

place.Themicrocontrollermustfirstreadinthedataontheentireport,modifyittotherequirednew

bitvaluesandthenrewritethisdatabacktotheoutputports.

PortAhastheadditionalcapabilityofprovidingwake-upfunctions.Whenthesedevicesareinthe

SLEEPorIDLEMode,variousmethodsareavailabletowakethesedevicesup.Oneoftheseisa

hightolowtransitionofanyofthePortApins.SingleormultiplepinsonPortAcanbesetupto

havethisfunction.

HT66F4530 Datasheet(PDF) 87 Page - Holtek Semiconductor Inc

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