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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 166
NoStatusControl0 – RW – 8 bits – [PM_Reg:7Ah]
Field Name Bits Default Description
NoStatusControl0 7:0 00h For GEVENT#[7:0] configured as PME# (wakeup function),
additional setting of these bits will still allow GEVENT# pins to
wakeup the system but they will not set the status bit in the
ACPI GEVENT status register.
Bits [7:0] control GEVENT#[7:0] respectively
0 – Allow status
1 – Not-allow status
NoStatusControl0 register
NoStatusControl1 – RW – 8 bits – [PM_Reg:7Bh]
Field Name Bits Default Description
NoStatusControl1 7:0 00h This register should be set the same as 7A
NoStatusControl1 register
MiscEnable7C – RW – 8 bits – [PM_Reg:7Ch]
Field Name Bits Default Description
BreakEnable 0 0b Set to 1 to allow wakeup from C3 without asserting LDTSTP#
in K8 system
Reserved 1 0b
BlinkControl 3:2 00b Blinking interval select
00: Always off
01: 1sec on, 3sec off, repeating
10: 2sec on, 2sec off, repeating
11: Always on
AltCenturyEnable 4 0b Set to 1 to enable RTC AltCentury register
SusStatOption 5 0b SUS_STAT# timing option enable
WaitStpGntEnB 6 0b 0: Wait for STPGNT# in ACPI S state;
1: No wait
Reserved 7 0b
MiscEnable7C register
DprSlpVrMinTime – RW – 8 bits – [PM_Reg:7Dh]
Field Name Bits Default Description
DprSlpVrMinTime 3:0 2h This defines the minimum assertion time of DPRSLPVR, in
2us increment with 2us uncertainty.
Reserved 7:4 0h
DprSlpVrMinTime register
SMAF0 – RW – 8 bits – [PM_Reg:80h]
Field Name Bits Default Description
S45SMAF 2:0 110b System management action field for S4/5 STPCLK message
Reserved 3 0b
C2SMAF 6:4 0h System management action field for C2 STPCLK message
Reserved 7 0b
SMAF0 register
SMAF1 – RW – 8 bits – [PM_Reg:81h]
Field Name Bits Default Description
C3SMAF 2:0 001b System management action field for C3 STPCLK message
Reserved 3 0b
VFSMAF 6:4 010b System management action field for VFID STPCLK message
Reserved 7 0b