Advantech SOM-5991, User Manual

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SOM-5991 User Manual 44
CPU Thermal Management
Figure 3.24 CPU Thermal Management
 Bi-directional PROCHOT#
When a processor thermal sensor trips (either core), the PROCHOT# will be
driven. IF bi-direction is enabled, external agents can drive PROCHOT# to throt-
tle the processor.
 Thermal Monitor
Enable or Disable Thermal Monitor.
 PROCHOT PREPONSE
Force CPU to throttle to a lower power condition such as Pn/Pm by asserting
PROCHOT#. MSR 0xaFC [26]
=1: go to Pm(min freq) on PROCHOT; =0: go to Pn (max efficient freq).
 Use PCH_HOT
Pcode is allowed to se PCH_HOT pin information for thermal management.
 Use PCH Temp From ME
Pcode is allowed to use PCH Temperature provided by ME.
 CPU To PCH Throttle
Enable Pcode to throttle PCH.