Holtek HT66F002 User Manual

Rev. 1.71 66 April 11, 2017 Rev. 1.71 67 April 11, 2017
HT66F002/HT66F0025/HT66F003/HT66F004
Cost-Effective A/D Flash MCU with EEPROM
HT66F002/HT66F0025/HT66F003/HT66F004
Cost-Effective A/D Flash MCU with EEPROM
TM Interrupts
TheStandardandPeriodictypeTMseachhastwointernalinterrupts,theinternalcomparatorAor
comparatorP,whichgenerateaTMinterruptwhenacomparematchconditionoccurs.WhenaTM
interruptisgenerated,itcanbeusedtoclearthecounterandalsotochangethestateoftheTMoutputpin. 
TM External Pins
EachoftheTMs,irrespectiveofwhattype,hastwoTMinputpins,withthelabelxTCKnand
xTPnI.TheTMinputpinxTCKn,isessentiallyaclocksourcefortheTMandisselectedusingthe
xTnCK2~xTnCK0bitsinthexTMnC0register.ThisexternalTMinputpinallowsanexternalclock
sourcetodrivetheinternalTM.ThisexternalTMinputpinissharedwithotherfunctionsbutwill
beconnectedtotheinternalTMifselectedusingthexTnCK2~xTnCK0bits.TheTMinputpincan
bechosentohaveeitherarisingorfallingactiveedge.
TheotherTMinputpin,xTPnI,isthecaptureinputwhoseactiveedgecanbearisingedge,afalling
edgeorbothrisingandfallingedgesandtheactiveedgetransitiontypeisselectedusingthexTnIO1
andxTnIO0bitsinthexTMnC1register.
TheTMseachhave twooutputpins withthelabelxTPnandxTPnB.WhentheTMisinthe
CompareMatchOutputMode,thesepinscanbecontrolledbytheTMtoswitchtoahighorlow
levelortotogglewhenacomparematchsituationoccurs.TheexternalxTPnoutputpinisalsothe
pinwheretheTMgeneratesthePWMoutputwaveform.AstheTMoutputpinsarepin-sharedwith
otherfunction,theTMoutputfunctionmustrstbesetupusingregisters.Asinglebitinoneofthe
registersdeterminesifitsassociatedpinistobeusedasanexternalTMoutputpinorifitistohave
anotherfunction.ThenumberofoutputpinsforeachTMtypeisdifferent,thedetailsareprovided
intheaccompanyingtable.
Device TM0 TM1
HT66F002/HT66F0025
STCK0, STP0I
STP0, STP0B
—
HT66F003
STCK0, STP0I
STP0, STP0B
PTCK1, PTP1I
PTP1, PTP1B
HT66F004
PTCK0, PTP0I
PTP0, PTP0B
PTCK1, PTP1I
PTP1, PTP1B
TM Input/Output Pins
TM Input/Output Pin Control Register
SelectingtohaveaTMinput/outputorwhethertoretainitsothersharedfunctionisimplemented
usingoneregister,withasinglebitineachregistercorrespondingtoaTMinput/outputpin.
ConguringtheselectionbitscorrectlywillsetupthecorrespondingpinasaTMinput/output.The
detailsofthepin-sharedfunctionselectionaredescribedinthepin-sharedfunctionsection.
STM
STP0
STCK0
Capture Input
TCK Input
Output
STP0I
STP0B
Inverting Output
STM Function Pin Control Block Diagram

Holtek HT66F002 Specifications

General

Brand	Holtek
Model	HT66F002
Category	Control Unit
Language	English