Intel
®
Core™ 2 Duo Processor and Intel
®
Core™ Duo Processor with Intel
®
E7520 Chipset Development Kit
January 2007
User’s Manual
Order Number: 316068-001US
41
Intel
®
Core™ 2 Duo Processor and Intel
®
Core™ Duo Processor with Intel
®
E7520 Chipset
Development Kit
4.2.10 Wake from S5 State
The power button is used to wake from S5.
4.3
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. Because of the limited amount of power
available on 3.3 V standby, the user and the operating system must configure the
system carefully following the PCI power management interface specification.
4.4
Platform Management
The ADM1023 monitors the majority of the system voltages. All voltage levels can be
read via the SMBus.
4.4.1
Processor Thermal Management
Each processor monitors its own core temperature and thermally manages itself when
it reaches a certain temperature. The system also uses the internal processor diode to
monitor the die temperature. The diode pins are routed to the diode input pins in the
ADM1023. The ADM1023 will use its A/D converter to determine the CPU temperature.
When the CPU temperature reaches its threshold, System Management will react
accordingly to lower the overall system temperature.
4.5
System Fan Operation
Power consumption can be adjusted by controlling the fan speed. The fan can be off,
running on 5 V, or running on 12 V. The system can adjust the fan speed depending on
the CPU temperature. If a system gets too hot, an alert will be sent to the System
Management controller. The administrator may then want to turn the system off but
keep the fan running to cool the system faster.