HT45F4MA datasheet(120/145 Pages) HOLTEK

120 / 145 page

Rev. 1.20

120

De�e��e� 1�� 201�

Rev. 1.20

121

De�e��e� 1�� 201�

HT45F4MA/HT45FH4MA/HT45FH4MA-1

Power Bank Flash MCU

HT45F4MA/HT45FH4MA/HT45FH4MA-1

Power Bank Flash MCU

External Interrupt

TheexternalinterruptsarecontrolledbysignaltransitionsonthepinsINT0,INT1.Anexternal

interruptrequestwilltakeplacewhentheexternalinterruptrequestflags,INT0F,INT1F,areset,

whichwilloccurwhenatransition,whosetypeischosenbytheedgeselectbits,appearsonthe

externalinterruptpins.Toallowtheprogramtobranchtoitsrespectiveinterruptvectoraddress,the

globalinterruptenablebit,EMI,andrespectiveexternalinterruptenablebit,INT0E,INT1E,must

firstbeset.AdditionallythecorrectinterruptedgetypemustbeselectedusingtheINTEGregisterto

enabletheexternalinterruptfunctionandtochoosethetriggeredgetype.Astheexternalinterrupt

pinsarepin-sharedwithI/Opins,theycanonlybeconfiguredasexternalinterruptpinsiftheir

externalinterruptenablebitinthecorrespondinginterruptregisterhasbeenset.Thepinmustalso

besetupasaninputbysettingthecorrespondingbitintheportcontrolregister.Whentheinterrupt

isenabled,thestackisnotfullandthecorrecttransitiontypeappearsontheexternalinterruptpin,

asubroutinecalltotheexternalinterruptvector,willtakeplace.Whentheinterruptisserviced,the

externalinterruptrequestflags,INT0F,INT1F,willbeautomaticallyresetandtheEMIbitwillbe

automaticallyclearedtodisableotherinterrupts.Notethatanypull-highresistorselectionsonthe

externalinterruptpinswillremainvalidevenifthepinisusedasanexternalinterruptinput.The

INTEGregisterisusedtoselectthetypeofactiveedgethatwilltriggertheexternalinterrupt.A

choiceofeitherrisingorfallingorbothedgetypescanbechosentotriggeranexternalinterrupt.

NotethattheINTEGregistercanalsobeusedtodisabletheexternalinterruptfunction.

OVP Interrupt

AnOVPInterruptrequestwilltakeplacewhentheOverVoltageProtectionInterruptrequestflag,

OVPF,isset,whichoccurswhentheOverVoltageProtectionfunctiondetectsanovervoltage

condition.Toallowtheprogramtobranchtoitsrespectiveinterruptvectoraddress,theglobal

interruptenablebit,EMI,andOverVoltageProtectionInterruptenablebit,mustfirstbeset.When

theinterruptisenabled,thestackisnotfullandanovervoltageconditionoccurs,asubroutinecall

totheOVPInterruptvector,willtakeplace.WhentheOverVoltageProtectionInterruptisserviced,

theEMIbitwillbeautomaticallyclearedtodisableotherinterruptsandtheinterruptrequestflag

willbealsoautomaticallycleared.

OCP Interrupt

AnOCPInterruptrequestwilltakeplacewhentheOverCurrentProtectionInterruptrequestflag,

OCPF,isset,whichoccurswhentheOverCurrentProtectionfunctiondetectsanovercurrent

condition.Toallowtheprogramtobranchtoitsrespectiveinterruptvectoraddress,theglobal

interruptenablebit,EMI,andOverCurrentProtectionInterruptenablebit,mustfirstbeset.When

theinterruptisenabled,thestackisnotfullandanovercurrentconditionoccurs,asubroutinecall

totheOCPInterruptvector,willtakeplace.WhentheOverCurrentProtectionInterruptisserviced,

theEMIbitwillbeautomaticallyclearedtodisableotherinterruptsandtheinterruptrequestflag

willbealsoautomaticallycleared.

HT45F4MA Datasheet(PDF) 120 Page - Holtek Semiconductor Inc

HT45F4MA Datasheet(HTML) 120 Page - Holtek Semiconductor Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL