HT45F4MA datasheet(22/145 Pages) HOLTEK

22 / 145 page

Rev. 1.20

De�e��e� 1�� 201�

Rev. 1.20

De�e��e� 1�� 201�

HT45F4MA/HT45FH4MA/HT45FH4MA-1

Power Bank Flash MCU

HT45F4MA/HT45FH4MA/HT45FH4MA-1

Power Bank Flash MCU

Look-up Table

AnylocationwithintheProgramMemorycanbedefinedasalook-uptablewhereprogrammerscan

storefixeddata.Tousethelook-uptable,thetablepointermustfirstbesetupbyplacingtheaddress

ofthelookupdatatoberetrievedinthetablepointerregister,TBLPandTBHP.Theseregisters

definethetotaladdressofthelook-uptable.

Aftersettingupthetablepointer,thetabledatacanberetrievedfromtheProgramMemoryusing

the“TABRD[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

TB LP R eg is te r

Da ta

16 b it s

Pr og ra m Me mo ry

Las t p age o r

TB HP R egi st er

Instruction

Table Location Bits

b10

TABRD [�]

@10

@�

TABRDL [�]

@�

Table Location

Note:b10~b0:Tablelocationbits

@7~@0:Tablepointer(TBLP)bits

@10~@8:Tablepointer(TBHP)bits

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