HT45F3W datasheet(95/167 Pages) HOLTEK

95 / 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

IftheT2CCLRbitintheTM2C1registerishighthenthecounterwillbeclearedwhenacompare

matchoccursfromComparatorA.However,hereonlytheT2AFinterruptrequestflagwillbe

generatedevenifthevalueoftheCCRPbitsislessthanthatoftheCCRAregisters.Thereforewhen

T2CCLRishighnoT2PFinterruptrequestflagwillbegenerated.IntheCompareMatchOutput

Mode,theCCRAcannotbesetto“0”.

Asthenameofthemodesuggests,afteracomparisonismade,theTMoutputpin,willchange

state.TheTMoutputpinconditionhoweveronlychangesstatewhenaT2AFinterruptrequestflag

isgeneratedafteracomparematchoccursfromComparatorA.TheT2PFinterruptrequestflag,

generatedfromacomparematchoccursfromComparatorP,willhavenoeffectontheTMoutput

pin.ThewayinwhichtheTMoutputpinchangesstatearedeterminedbytheconditionofthe

T2IO1andT2IO0bitsintheTM2C1register.TheTMoutputpincanbeselectedusingtheT2IO1

andT2IO0bitstogohigh,togolowortotogglefromitspresentconditionwhenacomparematch

occursfromComparatorA.TheinitialconditionoftheTMoutputpin,whichissetupafterthe

T2ONbitchangesfromlowtohigh,issetupusingtheT2OCbit.NotethatiftheT2IO1andT2IO0

bitsarezerothennopinchangewilltakeplace.

C ounte� Value

CCRP

CCRA

TnO N

TnPAU

TnPO L

CCRP Int.

Flag TnPF

CCRA Int.

Flag TnAF

TM O /P Pin

Ti� e

CCRP=0

CCRP > 0

C ounte� ove�flow

CCRP > 0

C ounte� �lea�ed �y C C R P value

Pause

Resu� e

Stop

Counte�

Resta�t

TnCCLR = 0; TnM [1:0] = 00

O utput pin set to

initial Level Low

if TnO C =0

O utput Toggle w ith

TnAF flag

N ote TnIO [1:0] = 10

A�tive H igh O utput sele�t

H e�e TnIO [1:0 ] = 11

Toggle O utput sele�t

O utput not affe�ted �y TnAF

flag. R e� ains H igh until �eset

�y TnO N �it

O utput Pin

R eset to Initial value

O utput �ont�olled �y

othe� pin-sha�ed fun�tion

O utput Inve�ts

w hen TnPO L is high

0xFFFF

Compare Match Output Mode - TnCCLR = 0 (n=2)

Note:1.WithTnCCLR=0aComparatorPmatchwillclearthecounter

2.TheTMoutputpiniscontrolledonlybytheTnAFflag

3.TheoutputpinisresettoitsinitialstatebyaTnONbitrisingedge

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