中断控制器中英文翻译_学位论文.doc

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1、毕业设计(论文)外文资料翻译院（系）：电子信息系专业：通信工程班级：B090310姓名：学号：B09031010外文出处：科技信息期刊附件：1.译文；2.原文2013年03月20LPC2101/2102/21036.5InterruptcontrollerTheVICacceptsalloftheinterruptrequestinputsandcategorizesthemasFIQ,vectoredIRQ,andnon-vectoredIRQasdefinedbyprogrammablesetti

2、ngs.Theprogrammableassignmentschememeansthatprioritiesofinterruptsfromthevariousperipheralscanbedynamicallyassignedandadjusted.FIQhasthehighestpriority.IfmorethanonerequestisassignedtoFIQ,theVICcombinestherequeststoproducetheFIQsignaltotheARMprocessor.T

3、hefastestpossibleFIQlatencyisachievedwhenonlyonerequestisclassifiedasFIQ,becausethentheFIQserviceroutinedoesnotneedtobranchintotheinterruptserviceroutinebutcanrunfromtheinterruptvectorlocation.IfmorethanonerequestisassignedtotheFIQclass,theFIQservicerou

4、tinewillreadawordfromtheVICthatidentifieswhichFIQsource(s)is(are)requestinganinterrupt.VectoredIRQshavethemiddlepriority.Sixteenoftheinterruptrequestscanbeassignedtothiscategory.Anyoftheinterruptrequestscanbeassignedtoanyofthe16vectoredIRQslots,amongwhi

5、chslot0hasthehighestpriorityandslot15hasthelowest.Non-vectoredIRQshavethelowestpriority.TheVICcombinestherequestsfromallthevectoredandnon-vectoredIRQstoproducetheIRQsignaltotheARMprocessor.TheIRQserviceroutinecanstartbyreadingaregisterfromtheVICandjumpi

6、ngthere.IfanyofthevectoredIRQsarepending,theVICprovidestheaddressofthehighest-priorityrequestingIRQsserviceroutine,otherwiseitprovidestheaddressofadefaultroutinethatissharedbyallthenon-vectoredIRQs.ThedefaultroutinecanreadanotherVICregistertoseewhatIRQs

7、areactive.6.5.1InterruptsourcesEachperipheraldevicehasoneinterruptlineconnectedtotheVectoredInterruptController,butmayhaveseveralinternalinterruptflags.Individualinterruptflags20mayalsorepresentmorethanoneinterruptsource.6.6PinconnectblockThepinconnectb

8、lockallowsselectedpinsofthemicrocontrollertohavemorethanonefunction.Configurationregisterscontrolthemultiplexerstoallowconnectionbetweenthepinandtheonchipperipherals.Peripheralsshouldbeconnectedtotheappropriatepinspriortobeingact