《ITEEC架构介绍》PPT课件.ppt

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1、Speaker:WYITE8512What’stheEC?EmbeddedControllercomesformACPIstructureHostiscommunicatedECbyLPCinterface.TheI/Oportare60/64and62/66ECintegratedps2device,keyboardmatrix,batterycharger,fancontrol,powersequence,hotkeyfunction,backlight,CPUthermalsensor,systempowerconsumption,etc

2、.SystemStructurePS/2KB/MSMATRIXFANControlChargerFlashROMPowerSequence….NBSBECLPCKeyboardControllerOverview18ScanOut(Column)ScanMatrixKeyboard3PS/2DevicesHostSystemLPC/FirmwareHubSMBusITEKBCPS/2ScanI2CHIF3SMBusDevices8ScanIn(Row)ECFeatureITEECPS/2KB/MSMATRIXACPIPowermanagemen

3、tSMBusKBSMonitorUART/CIRPWMADC/DACShareBIOSECPositionShareBIOSArchitecture64K~16MByteBIOSROMZoneKBCROMZone064KMax:16M64KByteMax:16M-64KByteFullspace16MByteKBCROMZoneBIOS&ECCodePositionFeaturesIBMAT&PS/28042-CompitableHostInterfacesSupportallstandardHostCommandsACPIEmbeddedCo

4、ntrollerInterfaceACPISystemManagementBusInterfacePS/2DevicesScanMatrixKeyboardOEMCustomizationFeatures–HostInterfaceHostInterfacesPrimaryHostInterface(0x60,0x64)HIF1–8042CommandInterfaceSecondaryHostInterface(0x62,0x66)HIF2–LogicalHIF–ACPICommandInterfaceHIF3–LogicalHIF–SMIA

5、ccessThirdHostInterface(0x68,0x6C)IBMAT&PS/28042-CompatibleStandardKBCCommands–0x64portStandardKBDCommands-0x60portStandardAUXCommands–0x64portD4commandCommandHandlerBitDescription7ParityError6TimeoutError5AuxiliaryOutputBufferFull4InhibitSwitch3Command/Data2SystemFlag1Input

6、BufferFull(IBF)0OutputBufferFull(OBF)KeyboardControllerStatusRegister64hFeatures–StandardKBCCommandsStandard64commandlistWrite/ReadKeyboardControllerCommandByte(60h/20h)TheKCCBresidesin8042RAMlocation20h,Address20hdefinedintheIBM8042programmingspecification.IBMstandardcomman

7、dset,usecommand20htoreadtheKCCBandcommand60htowriteKCCB.Default:0x65–PS/2MouseNotPresent0x47–PS/2MousePresentControllerCommandByte:Bit[7]-ReservedBit[6]-KeyboardTranslateBit[5]-DisableAuxiliaryDeviceBit[4]-DisableKeyboardBit[3]-ReservedBit[2]-SystemFlagBit[1]-EnableAuxiliary

8、InterruptBit[0]-EnableKeyboardInterruptFeatures–StandardKBCCommandsOutputBu