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34 Intel® Xeon® Processor E5-1600 v2/E5-2600 v2 Product Families
Datasheet Volume One of Two
Command: 0x01
Description: Returns the highest die temperature for addressed processor PECI client.
Example bus transaction for a thermal sensor device located at address 0x30 returning
a value of negative 10 counts is show in Figure 2-9.
2.5.2.3.2 Supported Responses
The typical client response is a passing FCS and valid thermal data. Under some
conditions, the client’s response will indicate a failure. GetTemp() response definitions
are listed in Table 2-3. Refer to Section 2.5.7.4 for more details on sensor errors.
Notes:
1. This response will be reflected in Bytes 5 & 6 in Figure 2-9.
2.5.2.4 RdPkgConfig()
The RdPkgConfig() command provides read access to the package configuration space
(PCS) within the processor, including various power and thermal management
functions. Typical PCS read services supported by the processor may include access to
temperature data, energy status, run time information, DIMM temperatures and so on.
Refer to Section 2.5.2.6 for more details on processor-specific services supported
through this command.
Figure 2-8. GetTemp()
Byte #
Byte
Definition
0
Client Address
1
Write Length
0x01
2
Read Length
0x02
4
FCS
5
Temp[7:0]
6
Temp[15:8]
7
FCS
3
Cmd Code
0x01
Figure 2-9. GetTemp() Example
Byte #
Byte
Definition
0
0x30
1
0x01
2
0x02
4
0xef
5
0x80
6
0xfd
7
0x4b
3
0x01
Table 2-3. GetTemp() Response Definition
Response Meaning
General Sensor Error (GSE)
1
Thermal scan did not complete in time. Retry is appropriate.
Bad Write FCS Electrical error
Abort FCS Illegal command formatting (mismatched RL/WL/Command Code)
0x0000
1
Processor is running at its maximum temperature or is currently being reset.
All other data Valid temperature reading, reported as a negative offset from T
Prochot
.