Intel® 500 Series Chipset Family On-Package PCH Datasheet Volume 1

Datasheet

ID Date Version Classification
631119 21/09/2021 00:00:00 Public Content

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Thermal Reporting to an EC

To support a platform EC that is managing the system thermals, the PCH provides the ability for the EC to read the PCH temperature over SMBus and/or over eSPI. If enabled, PMC will drive the temperature directly to the SMBus and eSPI units . The EC will issue an SMBus read or eSPI OOB Channel request and receives a single byte of data, indicating a temperature between 0 °C and 127 °C , where 255 (0xFF) indicates that the sensor is not enabled yet. The EC must be connected to either SMLink1 or eSPI for thermal reporting support.

Note:The catastrophic trip value is set to 120 °C and is not programmed or accessible by BIOS.