VT82C686B
Power Management-Specific PCI Configuration Registers
Offset 41 - General Configuration 1................................ RW
Offset 40 – General Configuration 0 ...............................RW
7
I/O Enable for ACPI I/O Base
7
Thermal Alarm Source Select
0
1
Disable access to ACPI I/O block.......... default
Allow access to Power Management I/O
Register Block (see offset 4B-48 to set the
base address for this register block). The
definitions of the registers in the Power
Management I/O Register Block are included
later in this document, following the Power
Management Subsystem overview.
0
From pin T11 (Function 0 Rx74[1] must be set
to define the pin as THRM#)..................default
From any of the three internal temperature
sensing circuits (see Rx43 and Rx44 of
Hardware Monitoring configuration space)
1
6
5
Sleep Button
0
Disable ...................................................default
1
Sleep Button is on IRQ6 pin (pin G1)
6
ACPI Timer Reset
Debounce LID and PWRBTN# Inputs for 200us
0
Normal Timer Operation ....................... default
0
Disable ...................................................default
1
Reset Timer
1
Enable
(Do Not Program)....def = 0
ACPI Timer Count Select
5-4 PMU Timer Test Mode
3
........................................ always reads 0
Microsoft Sound Monitor in Audio Access
4
3
Reserved
0
24-bit Timer........................................... default
0
Disable ...................................................default
1
32-bit Timer
1
Enable
2
RTC Enable Signal Gated with PSON (SUSC#) in
Soft-Off Mode
2
1
0
Game Port Monitor in Audio Access
0
Disable ...................................................default
0
Disable................................................... default
1
Enable
1
Enable
SoundBlaster Monitor in Audio Access
1
0
STPCLK Timer Tick Base Select
0
Disable ...................................................default
0
30 usec................................................... default
1
Enable
1
1 msec
MIDI Monitor in Audio Access
(Do Not Program).......def = 0
DEVSEL# Test Mode
0
Disable ...................................................default
1
Enable
Revision 1.71 June 9, 2000
-82-
Function 4 Regs - Power Management, SMBus and HWM
ETC [ ETC ]
