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HT66F4530 Datasheet(PDF) 163 Page - Holtek Semiconductor Inc |
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HT66F4530 Datasheet(HTML) 163 Page - Holtek Semiconductor Inc |
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163 / 224 page  Rev. 1.00 1�� De�e��e� �1� �01� Rev. 1.00 1�3 De�e��e� �1� �01� HT66F4530/HT66F4540/HT66F4550 A/D Flash MCU with Dual Operational Amplifiers HT66F4530/HT66F4540/HT66F4550 A/D Flash MCU with Dual Operational Amplifiers UART Interrupt Structure SeveralindividualUARTconditionscangenerateaUARTinterrupt.Whentheseconditionsexist, alowpulsewillbegeneratedtogettheattentionofthemicrocontroller.Theseconditionsarea transmitterdataregisterempty,transmitteridle,receiverdataavailable,receiveroverrun,address detectandanRXpinwake-up.Whenanyoftheseconditionsarecreated,iftheglobalinterrupt enablebit,multi-functioninterruptenablebitanditscorrespondinginterruptcontrolbitareenabled andthestackisnotfull,theprogramwilljumptoitscorrespondinginterruptvectorwhereitcan beservicedbeforereturningtothemainprogram.Fouroftheseconditionshavethecorresponding USRregisterflagswhichwillgenerateaUARTinterruptifitsassociatedinterruptenablecontrolbit intheUCR2registerisset.Thetwotransmitterinterruptconditionshavetheirowncorresponding enablecontrolbits,whilethetworeceiverinterruptconditionshaveasharedenablecontrolbit. TheseenablebitscanbeusedtomaskoutindividualUARTinterruptsources. Theaddressdetectcondition,whichisalsoaUARTinterruptsource,doesnothaveanassociated flag,butwillgenerateaUARTinterruptwhenanaddressdetectconditionoccursifitsfunctionis enabledbysettingtheADDENbitintheUCR2register.AnRXpinwake-up,whichisalsoaUART interruptsource,doesnothaveanassociatedflag,butwillgenerateaUARTinterruptiftheUART clock(fH)sourceisswitchedoffandtheWAKEandRIEbitsintheUCR2registeraresetwhena fallingedgeontheRXpinoccurs. NotethattheUSRregisterflagsarereadonlyandcannotbeclearedorsetbytheapplication program,neitherwilltheybeclearedwhentheprogramjumpstothecorrespondinginterrupt servicingroutine,asisthecaseforsomeoftheotherinterrupts.Theflagswillbecleared automaticallywhencertainactionsaretakenbytheUART,thedetailsofwhicharegiveninthe UARTregistersection.TheoverallUARTinterruptcanbedisabledorenabledbytherelated interruptenablecontrolbitsintheinterruptcontrolregistersofthemicrocontrollertodecidewhether theinterruptrequestedbytheUARTmoduleismaskedoutorallowed. T�ans�itte� E�pty Flag TXIF USR Registe� T�ans�itte� Idle Flag TIDLE Re�eive� Ove��un Flag OERR Re�eive� Data Availa�le RXIF ADDEN RX Pin Wake-up WAKE 0 1 0 1 RX7 if BNO=0 RX8 if BNO=1 UCR� Registe� RIE 0 1 TIIE 0 1 TEIE 0 1 UART Inte��upt Request Flag UARTF UCR� Registe� UARTE 0 1 EMI Inte��upt signal to MCU UART Interrupt Structure |
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