Intel 1005M AW8063801121200 Benutzerhandbuch

Datasheet, Volume 1

81

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 0h, except when the TCC activation offset is changed), the TCC will activate 
and indicate a Adaptive Thermal Monitor event. A TCC activation will lower both IA core 
and graphics core frequency, voltage or both.

Changes to the temperature can be detected using two programmable thresholds 
located in the processor thermal MSRs. These thresholds have the capability of 
generating interrupts using the core's local APIC. Refer to the Intel

Architectures Software Developer's Manuals for specific register and programming 
details.

The error associated with DTS measurement will not exceed ±5

 

°C at T

j,max

. The DTS 

measurement within the entire operating range will meet a ±5 °C accuracy.

Digital Thermal Sensor based fan speed control (T

FAN

) is a recommended feature to 

achieve optimal thermal performance. At the T

FAN

 temperature, Intel recommends full 

cooling capability well before the DTS reading reaches T

j,max

. An example of this would 

be T

FAN 

= T

j,max 

– 10

 ºC.

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 
will be asserted. PROCHOT# assertion policies are independent of Adaptive Thermal 
Monitor enabling.

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

For the package C7 state, PROCHOT# may de-assert for the duration of the C7 state 

residency, even if the processor enters the idle state operating at the TCC activation 

temperature. The PECI interface is fully operational during all C-states and it is 

expected that the platform continues to manage processor package thermals, even 

during idle states by regularly polling for thermal data over PECI.

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 will immediately transition to the minimum operation points (voltage 

and frequency) supported by the processor and graphics cores. This is contrary to 
the internally-generated Adaptive Thermal Monitor response. 

• Clock modulation is not activated.