HT68F005 datasheet(59/93 Pages) HOLTEK

59 / 93 page

Rev. 1.00

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Rev. 1.00

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HT68F005/HT68F006

Enhanced I/O Flash Type MCU

HT68F005/HT68F006

Enhanced I/O Flash Type MCU

Bit3

TnON:TMnCounterOn/OffControl

0:Off

1:On

Thisbitcontrolstheoverallon/offfunctionoftheTM.Settingthebithighenablesthe

countertorun,clearingthebitdisablestheTM.Clearingthisbittozerowillstopthe

counterfromcountingandturnofftheTMwhichwillreduceitspowerconsumption.

Whenthebitchangesstatefromlowtohightheinternalcountervaluewillberesetto

zero,howeverwhenthebitchangesfromhightolow,theinternalcounterwillretain

itsresidualvalue.

IftheTMisintheCompareMatchOutputModethentheTMoutputpinwillbereset

toitsinitialcondition,asspecifiedbytheTnOCbit,whentheTnONbitchangesfrom

lowtohigh.

Bit2~0

TnRP2~TnRP0:TMnCCRP3-bitregister,comparedwiththeTMnCounterbit9~bit7

ComparatorPMatchPeriod

000:1024TMnclocks

001:128TMnclocks

010:256TMnclocks

011:384TMnclocks

100:512TMnclocks

101:640TMnclocks

110:768TMnclocks

111:896TMnclocks

ThesethreebitsareusedtosetupthevalueontheinternalCCRP3-bitregister,which

arethencomparedwiththeinternalcounter’shighestthreebits.Theresultofthis

comparisoncanbeselectedtocleartheinternalcounteriftheTnCCLRbitissetto

zero.SettingtheTnCCLRbittozeroensuresthatacomparematchwiththeCCRP

valueswillresettheinternalcounter.AstheCCRPbitsareonlycomparedwiththe

highestthreecounterbits,thecomparevaluesexistin128clockcyclemultiples.

Clearingallthreebitstozeroisineffectallowingthecountertooverflowatits

maximumvalue.

HT68F005 Datasheet(PDF) 59 Page - Holtek Semiconductor Inc