COMe-cEL6 - User Guide, Rev.1.3
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2.5.5.
Temperature Sensors
The thermal resistor (Figure 4, pos. 1) measures the Multi Chip Package (MCP) temperature. The thermal resistor is
not capable of measuring very fast rises and falls in temperature and measurements may show a certain non-
linearity. The thermal resistor gives a general indication of the ambient temperature close to the MCP. When
comparing the thermal resistor value to the internal MCP values (i.e. DTS based values) differences are expected.
These differences are due to the design and are not to be considered as an error. The MCP’s temperature is referred
to as CPU temperature in the BIOS set up menu:
Advanced>H/W Monitor>Reference Temperature.
The on-module Hardware Monitor (HWM) chip uses an on-chip temperature sensor to measure the module’s
temperature and is referred to as module temperature in the BIOS set up menu:
Advanced>H/W Monitor>Reference
Temperature
. The HWM uses the SMBus interface, see Table 20: SMBus Address.
Figure 4: Module Temperature Sensors
1
RT1 -thermal resistor measure the
MCP temperature
2
HWM measure the modules
temperature
2
1
