Техническая Спецификация для Intel E3-1105C AV8062701048800

Intel

®

 Xeon

®

 and Intel

®

 Core™ Processors For Communications Infrastructure

Datasheet - Volume 1 of 2

May 2012

66

Document Number: 327405

-

001

Unlike traditional thermal devices, the DTS outputs a temperature relative to the 

maximum supported operating temperature of the processor (TJ-MAX), regardless of 

TCC activation offset. It is the responsibility of software to convert the relative 

temperature to an absolute temperature. The absolute reference temperature is 

readable in the TEMPERATURE_TARGET MSR 1A2h. The temperature returned by the 

DTS is an implied negative integer indicating the relative offset from TJ-MAX. The DTS 

does not report temperatures greater than TJ-MAX.  

The DTS-relative temperature readout directly impacts the Adaptive Thermal Monitor 

trigger point. When a package DTS indicates that it has reached the TCC activation (a 

reading of 0x0, except when the TCC activation offset is changed), the TCC activates 

and indicates an Adaptive Thermal Monitor event. A TCC activation lowers the IA core 

frequency, voltage or both.

Changes to the temperature can be detected via two programmable thresholds located 

in the processor thermal MSRs. These thresholds have the capability of generating 

interrupts via the core's local APIC. See the Intel

®

Developer's Manuals for specific register and programming details.

The error associated with DTS measurement does not exceed ±5°C at TJ-MAX. The 

DTS measurement within the entire operating range meets a ±5°C accuracy.

PROCHOT# (processor hot) is asserted when the processor core temperature has 

reached its maximum operating temperature (T

J-MAX

). See 

 for a timing 

diagram of the PROCHOT# signal assertion relative to the Adaptive Thermal Response. 

Only a single PROCHOT# pin exists at a package level. When any core arrives at the 

TCC activation point, the PROCHOT# signal is asserted. PROCHOT# assertion policies 

are independent of Adaptive Thermal Monitor enabling.

Bus snooping and interrupt latching are active while the TCC is active.

By default, the PROCHOT# signal is defined as an output only. However, the signal may 

be configured as bi-directional. When configured as a bi-directional signal, PROCHOT# 

can be used for thermally protecting other platform components should they overheat 

as well. When PROCHOT# is driven by an external device:

• The package immediately transitions to the minimum operation points (voltage and 

frequency) supported by the processor cores. This is contrary to the internally-

generated Adaptive Thermal Monitor response. 

• Clock modulation is not activated. 

The TCC remains active until the system deasserts PROCHOT#. The processor can be 

configured to generate an interrupt upon assertion and deassertion of the PROCHOT# 

signal. 

Toggling PROCHOT# more than once in 1.5ms period results in constant Pn state of the 

processor.

PROCHOT# may be used for thermal protection of voltage regulators (VR). System 

designers can create a circuit to monitor the VR temperature and activate the TCC 

when the temperature limit of the VR is reached. By asserting PROCHOT# (pulled-low) 

and activating the TCC, the VR cools down as a result of reduced processor power