Intel Z670 AY80609007293AA Data Sheet
Product codes
AY80609007293AA
Thermal Specifications and Design Considerations
34
Datasheet
An external signal, PROCHOT# (processor hot) is asserted when the processor detects
that its temperature is above the thermal trip point. Bus snooping and interrupt
latching are also active while the TCC is active.
Besides the thermal sensor and thermal control circuit, the Intel Thermal Monitor also
includes one ACPI register, one performance counter register, three MSRs, and one
I/O pin (PROCHOT#). All are available to monitor and control the state of the Intel®
Thermal Monitor feature. The Intel® Thermal Monitor can be configured to generate
an interrupt upon the assertion or de-assertion of PROCHOT#.
PROCHOT# will not be asserted when the processor is in the Sleep, Deep Sleep, and
). If the platform thermal solution is
not able to maintain the processor junction temperature within the maximum
specification, the system must initiate an orderly shutdown to prevent damage. If the
processor enters one of the above low power states with PROCHOT# already asserted,
then PROCHOT# will remain asserted until the processor exits the low power state and
the processor junction temperature drops below the thermal trip point.
If the Intel Thermal Monitor automatic mode is disabled, the processor will operate
out of specification. Regardless of enabling the automatic or on-demand modes, in the
event of a catastrophic cooling failure, the processor will automatically shut down
when the silicon has reached a potentially catastrophic temperature. At this point the
THERMTRIP# signal will go active. THERMTRIP# activation is independent of processor
activity and does not generate any bus cycles.
Table 5-2. Support for PROCHOT#/THERMTRIP# in Active and Idle States
System
State
Core
State
PROCHOT# (Bidirectional)
THERMTRIP#
Input
Output
Core
North
Complex
Core
North
Complex
Core
North
Complex
S0
C0
Supported
Optional
Active
Active
Active
Active
C1/C1E
Supported
Optional
Active
Active
Active
Active
C2/C2E
Supported
Optional
Active
Active
Active
Active
C4/C4E
Ignored
Optional
Inactive
Active
Not
Guaranteed
Active
C6
Ignored
Optional
Inactive
Active
Inactive
Active
5.2.1
Digital Thermal Sensor
The processor also contains an on die Digital Thermal Sensor (DTS) that is read using
an MSR (no I/O interface). The processor has a unique digital thermal sensor that’s
temperature is accessible using the processor MSRs. The DTS is the preferred method
of reading the processor die temperature since it can be located much closer to the
hottest portions of the die and can thus more accurately track the die temperature
and potential activation of processor core clock modulation using the Thermal Monitor.
The DTS is only valid while the processor is in the normal operating state (the Normal
package level low power state).