HT45F3W datasheet(81/167 Pages) HOLTEK

81 / 167 page

Rev. 1.50

De�e��e� 01� �01�

Rev. 1.50

De�e��e� 01� �01�

HT45F3W

R-Type Blood Pressure Meter Flash MCU

HT45F3W

R-Type Blood Pressure Meter Flash MCU

Bit3

T0ON:TM0CounterOn/OffControl

0:Off

1:On

Thisbitcontrolstheoverallon/offfunctionoftheTM.Settingthebithighenablesthe

countertorun,clearingthebitdisablestheTM.Clearingthisbittozerowillstopthe

counterfromcountingandturnofftheTMwhichwillreduceitspowerconsumption.

Whenthebitchangesstatefromlowtohightheinternalcountervaluewillbereset

tozero,howeverwhenthebitchangesfromhightolow,theinternalcounterwill

retainitsresidualvalue.IftheTMisintheCompareMatchOutputModethentheTM

outputpinwillberesettoitsinitialcondition,asspecifiedbytheT0OCbit,whenthe

T0ONbitchangesfromlowtohigh.

Bit2~0

T0RP2~T0RP0:TM0CCRP3-bitregister,comparedwiththeTM0Counterbit9~bit

7ComparatorPMatchPeriod

000:1024TM0clocks

001:128TM0clocks

010:256TM0clocks

011:384TM0clocks

100:512TM0clocks

101:640TM0clocks

110:768TM0clocks

111:896TM0clocks

ThesethreebitsareusedtosetupthevalueontheinternalCCRP3-bitregister,which

arethencomparedwiththeinternalcounter’shighestthreebits.Theresultofthis

comparisoncanbeselectedtocleartheinternalcounteriftheT0CCLRbitissetto

zero.SettingtheT0CCLRbittozeroensuresthatacomparematchwiththeCCRP

valueswillresettheinternalcounter.AstheCCRPbitsareonlycomparedwiththe

highestthreecounterbits,thecomparevaluesexistin128clockcyclemultiples.

Clearingallthreebitstozeroisineffectallowingthecountertooverflowatits

maximumvalue.

HT45F3W Datasheet(PDF) 81 Page - Holtek Semiconductor Inc