HT45F4MA datasheet(89/145 Pages) HOLTEK

89 / 145 page

Rev. 1.20

De�e��e� 1�� 201�

Rev. 1.20

De�e��e� 1�� 201�

HT45F4MA/HT45FH4MA/HT45FH4MA-1

Power Bank Flash MCU

HT45F4MA/HT45FH4MA/HT45FH4MA-1

Power Bank Flash MCU

Single Pulse Output Mode

Toselectthismode,bitsT1M1andT1M0intheTM1C1registershouldbesetto10respectively

andalsotheT1IO1andT1IO0bitsshouldbesetto11respectively.TheSinglePulseOutputMode,

asthenamesuggests,willgenerateasingleshotpulseontheTMoutputpin.

ThetriggerforthepulseoutputleadingedgeisalowtohightransitionoftheT1ONbit,whichcan

beimplementedusingtheapplicationprogram.HoweverintheSinglePulseMode,theT1ONbit

canalsobemadetoautomaticallychangefromlowtohighusingtheexternalTCK1pin,whichwill

inturninitiatetheSinglePulseoutput.WhentheT1ONbittransitionstoahighlevel,thecounter

willstartrunningandthepulseleadingedgewillbegenerated.TheT1ONbitshouldremainhigh

whenthepulseisinitsactivestate.Thegeneratedpulsetrailingedgewillbegeneratedwhenthe

T1ONbitisclearedtozero,whichcanbeimplementedusingtheapplicationprogramorwhena

comparematchoccursfromComparatorA.

HoweveracomparematchfromComparatorAwillalsoautomaticallycleartheT1ONbitandthus

generatetheSinglePulseoutputtrailingedge.InthiswaytheCCRAvaluecanbeusedtocontrol

thepulsewidth.AcomparematchfromComparatorAwillalsogenerateaTMinterrupt.Thecounter

canonlyberesetbacktozerowhentheT1ONbitchangesfromlowtohighwhenthecounter

restarts.IntheSinglePulseModeCCRPisnotused.TheT1CCLRisnotusedinthisMode.

Lead in g Ed ge

T1 ON b it

0 ® 1

S/ W Co mm and

SE T "T 1O N"

TC K1 P in T r ans it io n

T1 ON b it

1 ® 0

S/ W Co mm and

CL R "T 1O N"

CCR A Ma tc h C om par e

Pu ls e Wi dt h = CCRA V al ue

Tr ai li ng E dge

TM 1 Ou t put P in

Single Pulse Generation

HT45F4MA 데이터시트(PDF) 89 Page - Holtek Semiconductor Inc