HT68F003 datasheet(17/119 Pages) HOLTEK

17 / 119 page

Rev. 1.41

April 11, 2017

Rev. 1.41

April 11, 2017

HT68F002/HT68F0025/HT68F003

Cost-Effective Flash MCU with EEPROM

HT68F002/HT68F0025/HT68F003

Cost-Effective Flash MCU with EEPROM

Program Memory Structure

Special Vectors

WithintheProgramMemory,certainlocationsarereservedfortheresetandinterrupts.Thelocation

000Hisreservedforusebythesedevicesresetforprograminitialisation.Afteradeviceresetis

initiated,theprogramwilljumptothislocationandbeginexecution.

Look-up Table

AnylocationwithintheProgramMemorycanbedefinedasalook-uptablewhereprogrammerscan

storefixeddata.Tousethelook-uptable,thetablepointermustfirstbesetupbyplacingtheaddress

ofthelookupdatatoberetrievedinthetablepointerregister,TBLP.Thisregisterdefinesthetotal

addressofthelook-uptable.

Aftersettingupthetablepointer,thetabledatacanberetrievedfromtheProgramMemoryusing

the"TABRDC[m]"or"TABRDL[m]"instructions,respectively.Whentheinstructionisexecuted,

thelowerordertablebytefromtheProgramMemorywillbetransferredtotheuserdefined

DataMemoryregister[m]asspecifiedintheinstruction.Thehigherordertabledatabytefrom

theProgramMemorywillbetransferredtotheTBLHspecialregister.Anyunusedbitsinthis

transferredhigherorderbytewillbereadas"0".

Theaccompanyingdiagramillustratestheaddressingdataflowofthelook-uptable.

Re gi st er T BL H

Us er S el ec te d

Re gi st er

Hi gh B yt eL ow B yt e

PC H ig h By te

TB LP R eg is te r

Da ta

14bi ts

Pr og ra m Me mo ry

Las t p age o r

pr es en t pag e

PC 9 ~P C8

HT68F003 bảng dữ liệu(PDF) 17 Page - Holtek Semiconductor Inc