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Thermal/Mechanical Reference Design
smaller foot print and decreased sensitivity to noise. These DTS benefits will result in more accurate fan speed control and TCC activation.The DTS application in fan speed control will be discussed in more detail in Section 2.4.1.
2.2.3Platform Environmental Control Interface (PECI)
The PECI interface is designed specifically to convey system management information from the processor (initially, only thermal data from the Digital Thermal Sensor). It is a proprietary single wire bus between the processor and the chipset or other health monitoring device. The PECI specification provides a specific command set to discover, enumerate devices, and read the temperature. For an overview of the PECI interface, please refer to PECI Feature Set Overview. For more detailed information on PECI, please refer to Platform Environment Control Interface (PECI) Specification and Quad- Core Intel® Xeon® Processor 5400 Series Datasheet.
2.2.4Multiple Core Special Considerations
2.2.4.1Multiple Digital Thermal Sensor Operation
Each
Figure 2-5. DTS Domain for Quad-Core Intel® Xeon® Processor 5400 Series
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