HT46R003B datasheet(13/76 Pages) HOLTEK

13 / 76 page

Rev. 1.00

1�

��ne 1�� 01�

Rev. 1.00

��ne 1�� 01�

HT46R003B

Cost-Effective A/D 8-bit OTP MCU

HT46R003B

Cost-Effective A/D 8-bit OTP MCU

Program Memory

TheProgramMemoryisthelocationwheretheusercodeorprogramisstored.Thedeviceis

suppliedwithOne-TimeProgrammable,OTP,memorywhereuserscanprogramtheirapplication

codeintothedevice.Byusingtheappropriateprogrammingtools,OTPdeviceoffersusersthe

flexibilitytofreelydeveloptheirapplicationswhichmaybeusefulduringdebugorforproducts

requiringfrequentupgradesorprogramchanges.

Structure

TheProgramMemoryhasacapacityof1K×14bits.TheProgramMemoryisaddressedbythe

ProgramCounterandalsocontainsdata,tableinformationandinterruptentriesinformation.Table

data,whichcanbesetinanylocationwithintheProgramMemory,isaddressedbyseparatetable

pointerregister.

000H

Initialisation Vector

00�H

3FFH

1� bits

Interr�pt Vectors

010H

Look-�p Table

n00H

nFFH

Program Memory Structure

Special Vectors

WithintheProgramMemory,certainlocationsarereservedfortheresetandinterrupts.Thelocation

000Hisreservedforusebythedeviceresetforprograminitialisation.Afteradeviceresetis

initiated,theprogramwilljumptothislocationandbeginexecution.

Look-up Table

AnylocationwithintheProgramMemorycanbedefinedasalook-uptablewhereprogrammerscan

storefixeddata.Tousethelook-uptable,thetablepointermustfirstbesetbyplacingtheaddress

ofthelookupdatatoberetrievedinthetablepointerregister,TBLP.Thisregisterdefinesthetotal

addressofthelook-uptable.

Aftersettingupthetablepointer,thetabledatacanberetrievedfromtheProgramMemory

usingthe“TABRDC[m]”or“TABRDL[m]”instructions,respectively.Whentheinstructionis

executed,thelowerordertablebytefromtheProgramMemorywillbetransferredtotheuser

definedDataMemoryregister[m]asspecifiedintheinstruction.Thehigherordertabledatabyte

fromtheProgramMemorywillbetransferredtotheTBLHspecialregister.Anyunusedbitsinthis

transferredhigherorderbytewillbereadas“0”.

Theaccompanyingdiagramillustratestheaddressingdataflowofthelook-uptable.

HT46R003B Datasheet(PDF) 13 Page - Holtek Semiconductor Inc

HT46R003B 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 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76

Datasheet Download

Link URL