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Power and Thermal Specifications
5.3
CPU Thermal Monitoring
CPU Temperature
For a given minimum required air-flow, following curves (Figure 26 page 52) show the maximum authorized
operating temperature, not to exceed the maximum specified junction temperature of the processor.
T
CPU cores
105°C
:
JMAX
T
GFX cores: 100°C
JMAX
The T
temperature is the temperature not to exceed, to avoid entering the throttling mode.
JMAX
For instance, for:
> a VX3030 (Order Code: VX3030-SA22-00000) at 55°C for a frequency CPU Max. of 2 GHz, the minimum
air flow needed to cool enough the processor die is about 12 CFM (either 2.8 m/s) in a 0.8 inch slot.
The CPU temperature is also accessible through the Linux sensors driver. Refer to the
Fedora 12 (SD.DT.F72 ), section "BSP Specific Features - Sensors" for more information on this topic.
Page 52
CPU
Figure 26: VX3030 Thermal Performance
VX3030 User's Guide
Release Notes for BSP
CA.DT.A87-5e
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