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6300ESB ICH Development Kit User’s Manual 15
Platform Management
2.3.6 S5 State
This state is the normal off state whether entered through the Power Button or Soft Off. All power
is shut off except for the logic required to restart. The system remains in the S5 State only while the
power supply is plugged into the electrical outlet. If the power supply is unplugged, this is
considered a Mechanical OFF or G3.
2.3.7 Wake-Up Events
The types of wake-up events and wake-up latencies are related to the actual power rails available to
the system in a particular sleep state, as well as to the location in which the system context is
stored. Regardless of the Sleep State, Wake on the Power Button is always supported except in a
mechanical off situation. When in a Sleep State, the system complies with the PCI specification by
supplying the optional 3.3 V standby voltage to each PCI slot as well as the PME# signal. This
enables any compliant PCI card to wake up the system from supported sleep states except
Mechanical Off.
Note: Wake on USB, Wake on PS/2, and Wake on LAN are not supported.
2.3.8 Wake-Up from S1 Sleep State
During S1, the system is fully powered, permitting support for PCI Express* Wake and Wake on
PCI PME#.
2.3.9 Wake-Up from S4 and S5 States
The power button is used to wake from S4 and S5.
2.4 PCI PM Support
This design holds the system reset signal low when in a sleep state. The system supports the PCI
PME# signal and provides 3.3 V standby to the PCI and PCI Express slots. This support allows any
compliant PCI or PCI Express card to wake up the system from any sleep state except mechanical
off. The user and the operating system must configure the system carefully following the PCI
power management interface specification because of the limited amount of power available on
3.3 V standby.
2.5 Platform Management
The LM 93 monitors the majority of the system voltages. The VID signals from the processors are
also monitored by LM 93. All voltage levels can be read via the SMBus.