AMD SB600 Technical Reference Manual page 105

Field Name
GPIO_64_to_61_Cntrl register
Field Name
ASFSMBusEnable
Reserved
ASFSMBase
Field Name
GPIO_Out
GPIO_Out_En#
GPIO_Status
GPIO_Enable
GPIO_73_to_70_Cntrl register
Field Name
CheckLpc
CheckAz
CheckAc97
CheckPciBridge
CheckUsb
CheckSata
CheckIde
CheckC3
SmartPowerControl1A register
©2008 Advanced Micro Devices, Inc.
AMD SB600 Register Reference Manual
GPIO_64_to_61_Cntrl - RW – 16 bits - [PCI_Reg: 56h]
Bits Default
ASFSMbusIoBase- RW - 16 bits - [PCI_Reg: 58h]
Bits Default
0 0h
3:1 000b
15:4 FFFh
GPIO_73_to_70_Cntrl - RW – 16 bits - [PCI_Reg: 5Ah]
Bits Default
3:0 0h
7:4 Fh
11:8 -
15:12 0h
SmartPowerControl1A - RW – 8 bits - [PCI_Reg: 5Ch]
Bits Default
0 0b
1 0b
2 0b
3 0b
4 0b
5 0b
6 0b
7 0b
Description
Description
0 – Disable ASF controller
1 – Enable ASF controller
ASF SM bus controller Io base address
Description
Write 1 to set and 0 to clear each of the GPIO port ; providing
the corresponding GPIO_OUT_En# and GPIO_Enable are set
appropriately
Bit[0] for GPIO70/REQ3#
Bit[1] for GPIO71/REQ4#
Bit[2] for GPIO72/GNT3#
Bit[3] for GPIO73/GNT4#
GPIO output port enable for each of the GPIO port
0: Output = GPIO_Out
1: Output = tristate
GPIO input status for each of the GPIO port
GPIO function enable for each of the GPIO port
When set, the pin becomes GPIO
0: GPIO disabled
1: GPIO enabled
Description
If SmartVoltEnable is set and this bit is also set, the
SmartPower function will only assert SmartVolt if LPC is idle
If SmartVoltEnable is set and this bit is also set, the
SmartPower function will only assert SmartVolt if HD audio is
idle
If SmartVoltEnable is set and this bit is also set, the
SmartPower function will only assert SmartVolt if AC97 is idle
If SmartVoltEnable is set and this bit is also set, the
SmartPower function will only assert SmartVolt if HD Audio
PCIBridge is idle
If SmartVoltEnable is set and this bit is also set, the
SmartPower function will only assert SmartVolt if USBis idle
If SmartVoltEnable is set and this bit is also set, the
SmartPower function will only assert SmartVolt if SATA is idle
If SmartVoltEnable is set and this bit is also set, the
SmartPower function will only assert SmartVolt if IDE is idle
If SmartVoltEnable is set and this bit is also set, the
SmartPower function will only assert SmartVolt if CPU is in C3
state
SMBus Module and ACPI Block (Device 20, Function 0)
Proprietary Page 105