HT66F019 datasheet(85/175 Pages) HOLTEK

85 / 175 page

Rev. 1.00

De�e��e� 01� �01�

Rev. 1.00

De�e��e� 01� �01�

HT66F019

A/D Flash MCU with EEPROM

HT66F019

A/D Flash MCU with EEPROM

Single Pulse Output Mode

Toselectthismode,bitsSTM1andSTM0intheSTMC1registershouldbesetto10respectively

andalsotheSTIO1andSTIO0bitsshouldbesetto11respectively.TheSinglePulseOutputMode,

asthenamesuggests,willgenerateasingleshotpulseontheSTMoutputpin.

ThetriggerforthepulseoutputleadingedgeisalowtohightransitionoftheSTONbit,which

canbeimplementedusingtheapplicationprogram.HoweverintheSinglePulseOutputMode,the

STONbitcanalsobemadetoautomaticallychangefromlowtohighusingtheexternalSTCKpin,

whichwillinturninitiatetheSinglePulseoutput.WhentheSTONbittransitionstoahighlevel,the

counterwillstartrunningandthepulseleadingedgewillbegenerated.TheSTONbitshouldremain

highwhenthepulseisinitsactivestate.Thegeneratedpulsetrailingedgewillbegeneratedwhen

theSTONbitisclearedtozero,whichcanbeimplementedusingtheapplicationprogramorwhena

comparematchoccursfromComparatorA.

HoweveracomparematchfromComparatorAwillalsoautomaticallycleartheSTONbitand

thusgeneratetheSinglePulseoutputtrailingedge.InthiswaytheCCRAvaluecanbeusedto

controlthepulsewidth.AcomparematchfromComparatorAwillalsogenerateaSTMinterrupt.

ThecountercanonlyberesetbacktozerowhentheSTONbitchangesfromlowtohighwhenthe

counterrestarts.IntheSinglePulseOutputModeCCRPisnotused.TheSTCCLRandSTDPXbits

arenotusedinthisMode.

STON �it

0 → 1

S/W Co��and

SET“STON”

o�

STCK Pin

T�ansition

STON �it

1 → 0

CCRA

T�ailing Edge

S/W Co��and

CLR“STON”

o�

CCRA Co�pa�e

Mat�h

STP Output Pin

Pulse Width = CCRA Value

CCRA

Leading Edge

Single Pulse Generation

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