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©2008 Advanced Micro Devices, Inc.
SMBus Module and ACPI Block (Device 20, Function 0)
AMD SB600 Register Reference Manual Proprietary Page 112
SmartPowerControl2A - RW – 8 bits - [PCI_Reg: 98h]
Field Name Bits Default Description
CheckLpc 0 0b If SmartVoltEnable2 is set and this bit is also set, the
SmartPower2 function will only assert SmartVolt2 if LPC is idle
CheckAz 1 0b If SmartVoltEnable2 is set and this bit is also set, the
SmartPower2 function will only assert SmartVolt2 if azalia (HD
audio) is idle
CheckAc97 2 0b If SmartVoltEnable2 is set and this bit is also set, the
SmartPower2 function will only assert SmartVolt2 if AC97 is
idle
CheckPciBridge 3 0b If SmartVoltEnable2 is set and this bit is also set, the
SmartPower2 function will only assert SmartVolt2 if azalia
PCIBridge is idle
CheckUsb 4 0b If SmartVoltEnable2 is set and this bit is also set, the
SmartPower2 function will only assert SmartVolt2 if USBis idle
CheckSata 5 0b If SmartVoltEnable2 is set and this bit is also set, the
SmartPower2 function will only assert SmartVolt2 if SATA is
idle
CheckIde 6 0b If SmartVoltEnable2 is set and this bit is also set, the
SmartPower2 function will only assert SmartVolt2 if IDE is idle
CheckC3 7 0b If SmartVoltEnable2 is set and this bit is also set, the
SmartPower2 function will only assert SmartVolt2 if CPU is in
C3 state
SmartPowerControl2A register
SmartPowerControl2B - RW – 8 bits - [PCI_Reg: 99h]
Field Name Bits Default Description
CheckVIN0 0 0b If SmartVoltEnable is set and this bit is also set, the
SmartPower function will only assert SmartVolt2 if VIN0 has
reached or passed the threshold
CheckVIN1 1 0b If SmartVoltEnable is set and this bit is also set, the
SmartPower function will only assert SmartVolt2 if VIN1 has
reached or passed the threshold
CheckVIN2 2 0b If SmartVoltEnable is set and this bit is also set, the
SmartPower function will only assert SmartVolt2 if VIN2 has
reached or passed the threshold
CheckVIN3 3 0b If SmartVoltEnable is set and this bit is also set, the
SmartPower function will only assert SmartVolt2 if VIN3 has
reached or passed the threshold
CheckVIN4 4 0b If SmartVoltEnable is set and this bit is also set, the
SmartPower function will only assert SmartVolt2 if VIN4 has
reached or passed the threshold
CheckVIN5 5 0b If SmartVoltEnable is set and this bit is also set, the
SmartPower function will only assert SmartVolt2 if VIN5 has
reached or passed the threshold
CheckVIN6 6 0b If SmartVoltEnable is set and this bit is also set, the
SmartPower function will only assert SmartVolt2 if VIN6 has
reached or passed the threshold
CheckVIN7 7 0b If SmartVoltEnable is set and this bit is also set, the
SmartPower function will only assert SmartVolt2 if VIN7 has
reached or passed the threshold
SmartPowerControl2B register
SmartPowerControl2C - RW – 8 bits - [PCI_Reg: 9Ah]
Field Name Bits Default Description
SmartVoltIdleTime2 6:0 0h Amount of “idle” time (in 2us increment) the SmartPower2
function should wait before it should assert SmartVolt 2