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Platform Management Functional Overview
6.2
Advanced Configuration and Power Interface (ACPI)
The server board has support for the following ACPI states:
State
Supported
S0
Yes
Working.
S1
Yes
Sleeping. Hardware context is maintained; equates to processor and chipset clocks being
stopped.
The BMC detects that the system has exited the ACPI S1 sleep state when the BIOS SMI
handler notifies it.
S2
No
Not supported.
S3
No
Not supported.
Not supported.
S4
No
S5
Yes
Soft off.
6.3
Power Control Sources
The server board supports several power control sources which can initiate a power-up or
power-down activity.
Source
Power Button
BMC watchdog timer
Command
Power state retention
Chipset
CPU Thermal
56
Table 15. ACPI Power States
The front panel power LED is on (not controlled by the BMC).
The fans spin at the normal speed, as determined by sensor inputs.
Front panel buttons work normally.
The front panel power LED blinks at a rate of 1 Hz with a 50% duty cycle (not controlled
by the BMC).
The watchdog timer is stopped.
The power, reset, front panel NMI, and ID buttons are unprotected.
Fan speed control is determined by available SDRs. Fans may be set to a fixed state, or
basic fan management can be applied.
The front panel buttons are not locked.
The fans are stopped.
The power-up process goes through the normal boot process.
The power, reset, front panel NMI, and ID buttons are unlocked.
Table 16. Power Control Initiators
External Signal Name or Internal
Subsystem
Front Panel power button
Internal BMC timer
Routed through command processor
Implemented by means of BMC
internal logic
Sleep S4/S5 signal (same as
POWER_ON)
CPU Thermtrip
Intel order number G42278-002
Intel® Server Board S2600CO Family TPS
Description
Capabilities
Turns power on or off
Turns power off, or power cycle
Turns power on or off, or power cycle
Turns power on when AC power returns
Turns power on or off
Turns power off
Revision 1.0
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