Intel E5-2600, CM8062101038606 GetTemp, Client Address Write Length Read Length, Temp70 Temp158

Table 2-2. Minor Revision Number Meaning

Minor Revision Supported Command Suite

5Ping(), GetDIB(), GetTemp(), WrPkgConfig(), RdPkgConfig(), RdIAMSR(), RdPCIConfigLocal(), WrPCIConfigLocal(), RdPCIConfig(), WrPCIConfig()

6Ping(), GetDIB(), GetTemp(), WrPkgConfig(), RdPkgConfig(), RdIAMSR(),

RdPCIConfigLocal(), WrPCIConfigLocal(), RdPCIConfig(), WrPCIConfig(), WrIAMSR()

For the processor PECI client the Revision Number will return ‘0011 0100b’.

2.5.2.3GetTemp()

The GetTemp() command is used to retrieve the maximum die temperature from a target PECI address. The temperature is used by the external thermal management system to regulate the temperature on the die. The data is returned as a negative value representing the number of degrees centigrade below the maximum processor junction temperature (Tjmax). The maximum PECI temperature value of zero corresponds to the processor Tjmax. This also represents the default temperature at which the processor Thermal Control Circuit activates. The actual value that the thermal management system uses as a control set point (TCONTROL) is also defined as a negative number below Tjmax. TCONTROL may be extracted from the processor by issuing a PECI RdPkgConfig() command as described in Section 2.5.2.4 or using a RDMSR instruction. TCONTROL application to fan speed control management is defined in the Intel® Xeon® Processor E5-1600/E5-2600/E5-4600 Product Families Thermal/ Mechanical Design Guide.

Please refer to Section 2.5.7 for details regarding PECI temperature data formatting.

2.5.2.3.1Command Format

The GetTemp() format is as follows: Write Length: 0x01

Read Length: 0x02

Command: 0x01

Description: Returns the highest die temperature for addressed processor PECI client.

Figure 2-8. GetTemp()

Byte #	0		1				2				3
Byte	Client Address		Write Length			Read Length				Cmd Code
			0x01				0x02				0x01
Definition
	4				5				6		7
		FCS		Temp[7:0]				Temp[15:8]			FCS

34	Intel® Xeon® Processor E5-1600/E5-2600/E5-4600 Product Families
	Datasheet Volume One