車載MCU復(fù)位電路設(shè)計(jì)

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中圖分類號：U463.62 文獻(xiàn)標(biāo)識碼：A 文章編號：1003-8639（2025）06-0087-03

ResetCircuitDesign ofAutomotiveMCUs

ChangJun，YeDan，Ju Feng（Dalian Neusoft Smart Co.，Ltd.，Dalian ，China）

【Abstract】The development of theautomotive industry promotes the wideapplicationof MCU in the automotive field，and itsstableoperation dependsonthereset circuit.Althoughthe traditionalRCreset circuit is simpleand low costit has some disadvantages such aspower supply burr，slow edge response，por driving abilityand weak antiinterference，so itisnotsuitable for complexvehicleenvironment.ROHM'sBU42xx andBU43xx seriesof IC voltage detectorsofferawiderangeoffeaturesfortheautomotiveindustry.Thispaper mainlyintroducesitsoperationdescription， power-ondelaycalculation，working state waveform，and gives the practical application circuit and test results.Hope to provide some reference forrelated industries.

【Keywords】vehicle-mounted MCU；reset circuit；reliability

0 引言

復(fù)位引腳需至少保持 600ns ，才能確保系統(tǒng)可靠復(fù)位，最小復(fù)位電路如圖1所示。（剩余2761字）