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SE7501WV2 ACPI Implementation Intel® Server Board SE7501WV2 TPS
Revision 1.0
Intel reference number C25653-001
138
7.1.2 Wake up Sources (ACPI and Legacy)
The SE7501WV2 server board is capable of wake up from several sources under a non-ACPI
configuration, e.g., when the operating system does not support ACPI. The wake up sources
are defined in the following table. Under ACPI, the operating system programs the ICH3-S and
SIO to wake up on the desired event, but in legacy mode, the BIOS enables/disables wake up
sources based on an option in BIOS Setup. It is required that the operating system or a driver
will clear any pending wake up status bits in the associated hardware (such as the Wake on
LAN status bit in the LAN application specific integrated circuit (ASIC), or PCI power
management event (PME) status bit in a PCI device). The legacy wake up feature is disabled by
default.
Table 68. Supported Wake Events
Wake Event
Supported via ACPI (by
sleep state)
Supported Via Legacy
Wake
Power Button Always wakes system Always wakes system
Ring indicate from Serial A S1, S4, S5 Yes
Ring indicate from Serial B S1, S4, S5 Yes
PME from PCI 32/33 S1, S4, S5 Yes
PME from PCI secondary 64/33 S1, S4, S5 No
PME from primary PCI 64/66 S1, S4, S5 Yes
BMC source (i.e. EMP) Simulated as power button Simulated as power button
RTC Alarm S1, S4, S5 Yes
Mouse S1 No
Keyboard S1 No
USB No No