AMD SB600 - Manual (Page 114)

©2008 Advanced Micro Devices, Inc. SMBus Module and ACPI Block (Device 20, Function 0)
AMD SB600 Register Reference Manual Proprietary Page 114
GPIO_12_to_4_Cntrl – RW – 32 bits - [PCI_Reg: A8h]
Field Name Bits Default Description
GPIO_Out 7:0 00h Write 1 to set and 0 to clear each of the GPIO port providing
the corresponding bits [15:8], [25], [31:30] are enabled
Output for GPIO[12:11][9:4]
Bit[0] for GPIO4/SMARTVOLT
Bit[1] for GPIO5/SHUTDOWN/SMARTVOLT2
Bit[2] for GPIO6/GNI#
Bit[3] for GPIO7/VGATE
Bit[4] for GPIO8/DDC1_SDA
Bit[5] for GPIO9/DDC1_SCL
Bit[6] for GPIO11/SPI_DO
Bit[7] for GPIO12/SPI_DI
GPIO_Out_En# 15:8 FFh GPIO output port enable for each of the GPIO port
0: Output = GPIO_Out
1: Output = tristate
GpioIn 23:16 - GPIO input status for each of the GPIO port
GPIO10_Out 24 0b Write 1 to set and 0 to clear GPIO10/SATA_IS0#
GPIO10_Out_En# 25 1b GPIO output port enable for GPIO10/SATA_IS0#
0: Output = GPIO10_Out
1: Output = tristate
GPIO10_Status 26 - GPIO input status for GPIO10/SATA_IS0#
Reserved 29:27 000b
GPIO_Enable 31:30 0h GPIO function enable for GPIO[12:11]
0: GPIO disabled
1: GPIO enabled
GPIO_12_to_4_Cntrl register
SATA_Cntrl - RW – 16 bits - [PCI_Reg: ACh]
Field Name Bits Default Description
GPIO67_Out 0 0b Write 1 to set and 0 to clear GPIO67/SATA_ACT#
GPIO67_Out_En# 1 1b GPIO output port enable for GPIO67/SATA_ACT#
0: Output = GPIO67_Out
1: Output = tristate
GPIO67_Status 2 - GPIO input status for GPIO67/SATA_ACT#
GPIO67_Enable 3 0b GPIO function enable for GPIO67/SATA_ACT#
0: GPIO disabled
1: GPIO enabled
SMI_CMD_action 4 1b If this bit is enabled, SMI_CMD or SLP_trap will cause SMI
being sent to host regardless of EOS status. Otherwise, SMI is
sent only when EOS=1.
Reserved 7:5 0h
SataEnable 8 1b SATA enable
SataSmbusCfg 10:9 00b SATA SMBus configuration.
00: Reserved
01: Disable SATA SMBus
10: Reserved
11: Enable SATA SMBu
There is only one SATA SMBus (I2C) interface for the two
SATA controllers. The SATA I2C interface is only used for
characterization purposes. Use either an external I2C master
or the on-chip SMBus as I2C master to talk to the SATA I2C
target.
Reserved 12:11 00b
SataPsvEn 13 1b SATA power saving enable
Reserved 14 0b
HiddenMsiEnable 15 0b Setting this bit will make PCI_Reg:B0h, bit 16 to show up as 1.