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Introduction—Crystal Forest
BIOS Component
Patch Update
Mechanism
1.22
ACPI
ACPI gives the OS direct control over the power management and plug-and-play
functions of the platform. ACPI requires an OS that provides full ACPI support.
Under ACPI, the OS directs all system and device power state transitions by managing
devices in and out of low-power states based on user preferences and knowledge of
how devices are being used by applications. Devices that are not being used can be
turned off. The OS uses information from applications and user settings to put the
system as a whole into a low-power state.
Table 15.
Effects of Pressing the Power Button
If the system is in this
Off (ACPI G2/G5 - soft off)
On (ACPI G0 - working state)
On (ACPI G0 - working state)
Sleep (ACPI G1 - sleeping
state)
Sleep (ACPI G1 - sleeping
state)
1.23
Debug Ports
The CRB provides an XDP for the processor (XDP0 - J5A1) and an XDP for the PCH
(XDP1 - J6D2).
1.24
SMBus
The following figure provides a summary of the SMBus structure and address
information supplemental to the CRB schematics.
October 2012
Order No.: 328009-001US
•
G0 (S0) - Working
•
G1 (S3) - Sleeping [Suspend to RAM]
•
G2 (S5) - Soft Off
The BIOS supports C0, C1, C1E and C2 states.
The Patch Update Mechanism is used to upgrade and/or install micro-code patches
into BIOS is supported (BIOS Recovery Strap is located at J5A3 on the board).
...and the power switch is
state...
Less than four seconds
Less than four seconds
More than four seconds
Less than four seconds
More than four seconds
®
®
Intel
Xeon
Processor E3-1125C with Intel
Description
...the system enters this state
pressed for
Power-on (ACPI G0 - working state)
Soft-off/Standby (ACPI G1 - sleeping
state)
Fail Safe Power-off (ACPI G2/G5 -
soft off)
Wake-up (ACPI G0 - working state)
Power-off (ACPI G2/G5 - soft off)
®
Communications Chipset 8910 Development Kit
User Guide
19
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