AMD SB600 Technical Reference Manual page 138

Field Name
IdRegister
IdRegister register
Field Name
TALERT
Reserved
TempStatus register
Field Name
Reserved
TempSmiEnable
Reserved
ScratchBit
Reserved
TempInterrupt register
Field Name
Gpoc0Status
Gpoc1Status
Gpoc0_OE_
Gpoc1_OE_
Gpoc2Status
Gpoc3Status
Gpoc2_OE_
Gpoc3_OE_
I2CControl register: Writing to this register controls the output of the four Gpoc outputs (GPOC[3:0]_OE) and
reading returns the status of these pins.
Field Name
GPIO64En
GPIO64OUT
Gpoc[3:2]OUT
ScratchBit
GpmPortSel
Index13 misc control register
©2008 Advanced Micro Devices, Inc.
AMD SB600 Register Reference Manual
IdRegister - R – 8 bits - [IO_Reg: 00h]
Bits Default
7:0 00h
TempStatus - R – 8 bits - [IO_Reg: 02h]
Bits Default
0 - Logical status of TALERT/GPIO64 input.
Read will clear this bit.
7:1 00h
TempInterrupt - RW – 8 bits - [IO_Reg: 03h]
Bits Default
0 0b
1 0b 1 - Generate SMI# upon TALERT
0 - Do not generate SMI# upon TALERT
2 0b
3 0b This placebo bit has no function, but it may be used for
software status
7:4 0h
I2CControl - RW – 8 bits - [IO_Reg: 12h]
Bits Default
0 - Gpoc0 status. [Read-only]
1 - Gpoc1 status. [Read-only]
2 1b 1 - Gpoc0 is tristate
0 - Gpoc0 is asserted low
3 1b 1 - Gpoc1 is tristate
0 - Gpoc1 is asserted low
4 - Gpoc2 status. [Read-only]
5 - Gpoc3 status. [Read-only]
6 1b 1 - Gpoc2 is tristate
0 - Gpoc2 is output enabled
7 1b 1 – Gpoc3 is tristate
0 – Gpoc3 is output enabled
Index13– 8 bits - [IO_Reg: 13h]
Bits Default
0 0b GPIO64 output enable
1 = Enable
0 = Tristate
1 0b GPIO64 output data
3:2 00b Gpoc[3:2] output data
5:4 00b Placebo bit, has no function but may be used for software
status
7:6 00b 00-Read port
01-Output enable
10-Output port
Description
Description
Description
Description
Description
SMBus Module and ACPI Block (Device 20, Function 0)
Proprietary Page 138