HT45F65 datasheet(42/231 Pages) HOLTEK

42 / 231 page

Rev. 1.60

��

�ove��e� �� 01�

Rev. 1.60

�3

�ove��e� �� 01�

HT45F65/HT45F66/HT45F67

Glucose Meter 8-Bit Flash MCU

BP Register (HT45F67)

Bit

�a�e

—

PMBP1

PMBP0

—

DMBP�

DMBP1

DMBP0

R/W

—

R/W

—

R/W

POR

—

Bit7

Unimplemented,readas"0"

Bit6~5

PMBP1, PMBP0:SelectProgramMemoryBanks

00:Bank0,ProgramMemoryAddressisfrom0000H~1FFFH

01:Bank1,ProgramMemoryAddressisfrom2000H~3FFFH

10:Bank2,ProgramMemoryAddressisfrom4000H~5FFFH

11:Bank3,ProgramMemoryAddressisfrom6000H~7FFFH

Tosuccessfullyjumptoanon-consecutiveprogrammemoryaddresslocatedin

differentprogrammemorybankusingthebranchinstructionsshcuas“JMP”or

“CALL”,thecorrespondingprogrammemorybankpointerbits,PMBP1~PMBP0,

shouldfirstbeproperlysetupbeforethebranchinstructionsareexecuted.

Bit4~3

Unimplemented,readas"0"

Bit2~0

DMBP2~DMBP0:SelectDataMemoryBanks

000:Bank0

001:Bank1

010:Bank2

011:Bank3

100:Bank4

110~111:Undefined

Accumulator – ACC

TheAccumulatoriscentraltotheoperationofanymicrocontrollerandiscloselyrelatedwith

operationscarriedoutbytheALU.TheAccumulatoristheplacewhereallintermediateresults

fromtheALUarestored.WithouttheAccumulatoritwouldbenecessarytowritetheresultof

eachcalculationorlogicaloperationsuchasaddition,subtraction,shift,etc.,totheDataMemory

resultinginhigherprogrammingandtimingoverheads.Datatransferoperationsusuallyinvolve

thetemporarystoragefunctionoftheAccumulator;forexample,whentransferringdatabetween

oneuserdefinedregisterandanother,itisnecessarytodothisbypassingthedatathroughthe

Accumulatorasnodirecttransferbetweentworegistersispermitted.

Program Counter Low Register – PCL

Toprovideadditionalprogramcontrolfunctions,thelowbyteoftheProgramCounterismade

accessibletoprogrammersbylocatingitwithintheSpecialPurposeareaoftheDataMemory.By

manipulatingthisregister,directjumpstootherprogramlocationsareeasilyimplemented.Loading

avaluedirectlyintothisPCLregisterwillcauseajumptothespecifiedProgramMemorylocation,

however,astheregisterisonly8-bitwide,onlyjumpswithinthecurrentProgramMemorypageare

permitted.Whensuchoperationsareused,notethatadummycyclewillbeinserted.

Look-up Table Registers – TBLP, TBHP, TBLH

Thesethreespecialfunctionregistersareusedtocontroloperationofthelook-uptablewhichis

storedintheProgramMemory.TBLPandTBHParethetablepointerandindicatesthelocation

wherethetabledataislocated.Theirvaluemustbesetupbeforeanytablereadcommandsare

executed.Theirvaluecanbechanged,forexampleusingthe"INC"or"DEC"instructions,allowing

foreasytabledatapointingandreading.TBLHisthelocationwherethehighorderbyteofthetable

dataisstoredafteratablereaddatainstructionhasbeenexecuted.Notethatthelowerordertable

databyteistransferredtoauserdefinedlocation.

HT45F65 Datasheet(PDF) 42 Page - Holtek Semiconductor Inc

HT45F65 Datasheet(HTML) 42 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 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL