40
Electrical Data
Chapter 7
AMD Athlon™ XP Processor Model 6 Data Sheet
24309E—March 2002
Preliminary Information
Thermal Protection Characterization.
The following section describes
parameters relating to thermal protection. The implementation
of thermal control circuitry to control processor temperature is
left to the manufacturer to determine how to implement.
Thermal limits in motherboard design are necessary to protect
the processor from thermal damage. T
S H U T D OW N
is the
temperature for thermal protection circuitry to initiate
shutdown of the processor. T
SD_DELAY
is the maximum time
allowed from the detection of the over-temperature condition to
processor shutdown to prevent thermal damage to the
processor.
Systems that do not implement thermal protection circuitry or
that do not react within the time specified by T
SD_DELAY
can
cause thermal damage to the processor during the unlikely
events of fan failure or powering up the processor without a
heat-sink. The processor relies on thermal circuitry on the
motherboard to turn off the regulated core voltage to the
processor in response to a thermal shutdown event.
Thermal protection circuitry reference designs and thermal
solution guidelines are found in the following documents:
■
AMD Athlon™ Processor-Based Motherboard Design Guide,
order# 24363
■
Thermal Diode Monitoring Circuits,
order# 25658
■
AMD Thermal, Mechanical, and Chassis Cooling Design Guide
,
order# 23794
■
http://www1.amd.com/products/athlon/thermals
Table 15 on page 41 shows the T
SHUTDOWN
and T
SD_DELAY
specifications for circuitry in motherboard design necessary for
thermal protection of the processor.