Intel C2518 FH8065501516710 Data Sheet

Intel

®

 Atom™ Processor C2000 Product Family for Microserver

Datasheet, Vol. 2 of 3

September 2014

148

Order Number: 330061-002US

Two programmable thresholds per CPU core sensor are provided for Advanced 

Configuration and Power Interface (ACPI) compliant thermal management via software. 

The thresholds are specified as an offset below T

J-MAX

 via registers and configured to 

trigger a CPU thermal interrupt. ACPI software routines then take appropriate action 

when the interrupts get serviced.

The Core HOT threshold indicates that a thermal sensor in the core has exceeded the 

maximum-allowed operating temperature (defaults to T

J-MAX

). The die temperature 

readout of each sensor is periodically compared against the T

J-MAX

 value. Corrective 

actions are taken if the threshold value is exceeded. The Core HOT condition triggers 

the Intel

®

 Thermal Monitor 1 or Intel

® 

Thermal Monitor 2 thermal control circuit 

mechanisms (if enabled).

Programmable hysteresis offsets are utilized to prevent oscillation of the Core HOT 

condition around the threshold. Hysteresis in terms of temperature offset is specified 

for both triggering and deactivating the Core HOT condition.

The Core Out of Specification threshold indicates that a thermal sensor is close to 

reaching a catastrophic temperature which permanently damages the device. This 

programmable threshold is set above T

J-MAX

 with a default value of 5 °C above T

J-MAX

. 

This threshold does not trigger any thermal throttling mechanisms.