HT46R002 datasheet(13/83 Pages) HOLTEK

13 / 83 page

Rev. 1.21

April 11, 2017

Rev. 1.21

April 11, 2017

HT46R002/HT46R003

Cost-Effective A/D 8-Bit OTP MCU

HT46R002/HT46R003

Cost-Effective A/D 8-Bit OTP MCU

Arithmetic and Logic Unit – ALU

Thearithmetic-logicunitorALUisacriticalareaofthemicrocontrollerthatcarriesoutarithmetic

andlogicoperationsoftheinstructionset.Connectedtothemainmicrocontrollerdatabus,theALU

receivesrelatedinstructioncodesandperformstherequiredarithmeticorlogicaloperationsafter

whichtheresultwillbeplacedinthespecifiedregister.AstheseALUcalculationoroperationsmay

resultincarry,borroworotherstatuschanges,thestatusregisterwillbecorrespondinglyupdatedto

reflectthesechanges.TheALUsupportsthefollowingfunctions:

• Arithmeticoperations:ADD,ADDM,ADC,ADCM,SUB,SUBM,SBC,SBCM,DAA

• Logicoperations:AND,OR,XOR,ANDM,ORM,XORM,CPL,CPLA

• RotationRRA,RR,RRCA,RRC,RLA,RL,RLCA,RLC

• IncrementandDecrementINCA,INC,DECA,DEC

• Branchdecision,JMP,SZ,SZA,SNZ,SIZ,SDZ,SIZA,SDZA,CALL,RET,RETI.

Program Memory

TheProgramMemoryisthelocationwheretheusercodeorprogramisstored.Thedeviceis

suppliedwithOne-TimeProgrammable,OTP,memorywhereuserscanprogramtheirapplication

codeintothedevice.Byusingtheappropriateprogrammingtools,OTPdevicesofferusersthe

flexibilitytofreelydeveloptheirapplicationswhichmaybeusefulduringdebugorforproducts

requiringfrequentupgradesorprogramchanges.

Structure

TheProgramMemoryhasacapacityof1K×14bits.TheProgramMemoryisaddressedbythe

ProgramCounterandalsocontainsdata,tableinformationandinterruptentriesinformation.Table

data,whichcanbesetinanylocationwithintheProgramMemory,isaddressedbyseparatetable

pointerregisters.

00H

De vi ce I ni ti al P r ogr am

3F FH

Ex te r nal I nt e rr upt

Ti me r 0 In te rr upt

04H

08H

0C H

14 bi ts

A /D In te rr upt

: Un us ed, r ead as " 00"

Program Memory Structure

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