HT68F001 datasheet(13/55 Pages) HOLTEK

13 / 55 page

Rev. 1.01

1�

��to�e� 11� �01�

Rev. 1.01

��to�e� 11� �01�

HT68F001

Cost-Effective Flash MCU

HT68F001

Cost-Effective Flash MCU

Sta�k

Pointe�

Sta�k Level �

Sta�k Level 1

P�og�am Memo�y

P�og�am Counte�

Bottom of Sta�k

Top of Sta�k

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

• Rotation:RRA,RR,RRCA,RRC,RLA,RL,RLCA,RLC

• IncrementandDecrement:INCA,INC,DECA,DEC

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

Theinstructionsrelatedtotheimmediatedataareonlyavailableforthe4-bitlownibble.The4-bit

highnibbledatamustbefilledwithavalueof0H.Therefore,todealwiththeoperationwithan

8-bitimmediatedata,thehighnibbledatashouldfirstbeprocessedfollowedbythelownibbledata

togetherwiththeSWAPinstruction.

Toachievethe“MOVA,03CH”operation,thefollowingthreeinstructionsshouldbeexecuted:

MOV A,03H ;Highnibbleimmediatedataprocessedfirst

SWAP ACC

MOV A,0CH

; Low nibble immediate data processed later

Toachievethe“RETA,0C3H”operation,thefollowingthreeinstructionsshouldbeexecuted:

MOV A,0CH ;Highnibbleimmediatedataprocessedfirst

SWAP ACC

RET A,03H

; Low nibble immediate data processed later

HT68F001 Datasheet(PDF) 13 Page - Holtek Semiconductor Inc

HT68F001 Datasheet(HTML) 13 Page - Holtek Semiconductor Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55

Datasheet Download

Link URL