amd主板上电时序控制芯片it8282m资料

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1、AMD主板上电时序控制芯片IT8282M资料管理提醒：木帖被阿宇从台式电脑主板电路图纸移动到木区(2010-04-09)IT8282M在主板上多用来控制AMD主板的上电时序，包括PSON,VDDA_EN,VLDT_EN,Vcore_en5vdimm_str_en等信号vaVCOREGOVCOREGDVLDT12VDDA25VDIMMSTRK8CPUPWRGDSouthBridge51S8PSONfACPIS3ACPIS3tATXPowerPSONTVDIMMSTRVLDT.12VD叽25VDDA.ENVLDTENVDtMMVDDAIT8282MEnhoncedK8Po

2、werSequenceCoRtrolkePWR_SequenceaPWRGD/DelayLogicDelayLogicPin(s)AttriNo.SymbQ，buteDeSCripti°nVCORE_DIGDVLDT1_Al2VDDA2_Al5VCOREPowerGoodActivehigh.Thissignalin

3、dicatesthatthepower-goodsignalisfromthePWMcontrollerforCPUcorevoltage.VLDT(1.2V)analoginputs.VLDT(2.5V)analoginputs.VDIMMAlVDIMMDUALSTR(2.5V)analoginputs._STRSouthBridgePSON#SB—PSOp]SB_PSON#:Activelow.ThissignalisconnectedtothePSON#signN#alfromthesouth-bridgeorSuperI/Otocontroltheon/off

4、ofATXpowersupplyAGPIOpinfromS/BACPI_S3DIActivehigh.ThissignalindicatesthatthesystemisinACPIS3stateATXPower-Good/GNDATX_P7DIATX_PWRGD:Activehigh,inputindicatesthatATXpowersupplyWRGDpower-goodisready8GNDPWRGroundATXPSDIOATXPowerPSON#9_ON#D8ATX_PSON#:Acitvelow.ThefunctionofthispinisATXPowe

5、rSupplyOn/OffResetButtoninputRSTBTN7#DIRSTBTN#:Activelow.Thefunctionofthispinispanelresetbuttoninputwithde-bouncecircuit.CPUPower-GoodCPU_PDOD8Activehigh.OutputindicatesthatCPUpower-goodisready.WRGD16TheexternalpullhighresistorisrequiredVDIMMVDIMMSTREnableDOD9_STR_EActivehigh.Thefunctio

6、nofthispinistoenablethePWMforVDI8NMM_STRdualvoltage.TheexternalpullhighresistorisrequiredVCOREEnableVCORE_DOD10Activehigh.ThefunctionofthispinistoenablethePWMforCPUEN8VCORE.TheexternalpullhighresistorisrequiredVDDAEnableVDDA_EDOD11Activehigh.ThefunctionofthispinistoenablethePWMforVDDN8A

7、powerfork8CPU.TheexternalpullhighresistorisrequiredVLDTEnableVLDT_EDOD12Activehigh.ThefunctionofthispinistoenablethePWMforVLDN8Tvoltage.Theexternalpullhighresistorisrequired135VSBPWR+5VStandbyPowerSupplyIT8282M在主板上多用来控制AMD主板的上电时序，包括PSON,VDDA_EN,VLDT_EN,VCORE_EN,VDIMM_STR_EN等信号