HT45F3W datasheet(24/167 Pages) HOLTEK

24 / 167 page

Rev. 1.50

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HT45F3W

R-Type Blood Pressure Meter Flash MCU

HT45F3W

R-Type Blood Pressure Meter Flash MCU

regardingthein-circuitprogrammingofthedevicearebeyondthescopeofthisdocumentandwill

besuppliedinsupplementaryliterature.

Duringtheprogrammingprocess,takingcontrolofthePA0andPA2I/Opinsfordataandclock

programmingpurposes.Theusermusttheretakecaretoensurethatnootheroutputsareconnected

tothesetwopins.

Wr it er _V DD

IC PD A

IC PC K

Wr it er _V SS

To o th er C ir cu it

PA2

VSS

PA 0

VD D

Wr it er C onne ct or

Si gnal s

M CU Pr og ra mm in g

Pi ns

Note:*mayberesistororcapacitor.Theresistanceof*mustbegreaterthan1korthe

capacitanceof*mustbelessthan1nF.

In Application Programming – IAP

ThisdeviceoffersIAPfunctiontoupdatedataorapplicationprogramtoflashROM.Userscan

defineanyROMlocationforIAP,buttherearesomefeatureswhichusermustnoticeinusingIAP

function.

• Erasepage:64words/page

• Writing:64words/time

• Reading:1word/time

In Application Programming Control Register

TheAddressregister,FARL/FARH,andtheDataregister,FD0L/FD0H,FD1L/FD1H,FD2L/FD2H

andFD3L/FD3H,locatedinDataMemoryBank0,togetherwiththeControlregister,FC0,FC1

andFC2,locatedinDataMemoryBank1arethecorrespondingFlashaccessregistersforIAP.As

indirectaddressingistheonlywaytoaccesstheFC0,FC1andFC2registers,allreadandwrite

operationstotheregistersmustbeperformedusingtheIndirectAddressingRegister,IAR1,andthe

MemoryPointer,MP1.BecausetheFC0,FC1andFC2controlregistersarelocatedattheaddressof

43H~45HinDataMemoryBank1,theMP1MemoryPointermustfirstbesettothevalue43H~45H

andtheBankPointersetto“1”.

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