RJ80535 Intel, RJ80535 Datasheet - Page 71

• Manufacturer Part Number: RJ80535
• Description: Pentium M Processor
• Manufacturer: Intel

5.1
5.1.1
Intel
®
Table 24. Thermal Diode Interface
Table 25. Thermal Diode Specifications
Pentium
Note: The reading of the external thermal sensor (on the motherboard) connected to the processor
®
Thermal Specifications
Thermal Diode
The Intel Pentium M processor incorporates two methods of monitoring die temperature, the Intel
Thermal Monitor and the thermal diode. The Intel Thermal Monitor (detailed in
be used to determine when the maximum specified processor junction temperature has been
reached. The second method, the thermal diode, can be read by an off-die analog/digital converter
(a thermal sensor) located on the motherboard, or a stand-alone measurement kit. The thermal
diode may be used to monitor the die temperature of the processor for thermal management or
instrumentation purposes but cannot be used to indicate that the maximum T
been reached. Please see
PROCHOT# signal is not asserted.
thermal diode signals, will not necessarily reflect the temperature of the hottest location on the die.
This is due to inaccuracies in the external thermal sensor, on-die temperature gradients between the
location of the thermal diode and the hottest location on the die, and time based variations in the die
temperature measurement. Time based variations can occur when the sampling rate of the thermal
diode (by the thermal sensor) is slower than the rate at which the T
The offset between the thermal diode based temperature reading and the Intel Thermal Monitor
reading can be characterized using the Intel Thermal Monitor’s automatic mode activation of the
thermal control circuit. This temperature offset must be taken into account when using the
processor thermal diode to implement power management events.
NOTES:
M Processor Datasheet
2. Not 100% tested. These power specifications are determined by characterization of the processor currents at
3. As measured by the on-die Intel Thermal Monitor. The Intel Thermal Monitor’s automatic mode is used to
4. The Intel Thermal Monitor automatic mode must be enabled for the processor to operate within
Table 24
Symbol
I
n
R
FW
higher temperatures and extrapolating the values for the temperature indicated.
indicate that the maximum T
specifications.
T
and
Signal Name
THERMDA
THERMDC
Parameter
Forward Bias Current
Diode Ideality Factor
Series Resistance
Table 25
provide the diode interface and specifications.
Section 5.1.2
J
has been reached. Refer to
Min
Thermal Specifications and Design Considerations
for thermal diode usage recommendation when the
1.00151
Pin/Ball Number
5
B18
A18
Typ
1.00220
3.06
Section 5.1
Max
1.00289
for more details.
300
J
temperature can change.
Thermal diode cathode
Thermal diode anode
Signal Description
Unit
ohms
J
of the processor has
A
Section
Notes
Note 1
Notes 2, 3, 4
2, 3, 5
5.1) must
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