Intel E5-2600 Device Discovery, Client Addressing, Peci Client Response During Power-Up Sheet 2

Table 2-16. PECI Client Response During Power-Up (Sheet 2 of 2)

Command	Response During	Response During
	‘Data Not Ready’	‘Available Except Core Services’
RdPCIConfigLocal()	Client responds with a timeout completion	Fully functional
	code of 0x81
WrPCIConfigLocal()	Client responds with a timeout completion	Fully functional
	code of 0x81
RdPCIConfig()	Client responds with a timeout completion	Fully functional
	code of 0x81

In the event that the processor is tri-stated using power-on-configuration controls, the PECI client will also be tri-stated. Processor tri-state controls are described in Section 7.3, “Power-On Configuration (POC) Options”.

Figure 2-49. The Processor PECI Power-up Timeline()

PWRGOOD
RESET_N
Core execution	In Reset			idle	running
				Reset uCode	Boot BIOS
PECI Client	In Reset	Data Not Ready		Available except core	Fully Operational
Status				services
SOCKET_ID[1:0]	X		SOCKET ID Valid

2.5.3.2Device Discovery

The PECI client is available on all processors. The presence of a PECI enabled processor in a CPU socket can be confirmed by using the Ping() command described in Section 2.5.2.1. Positive identification of the PECI revision number can be achieved by issuing the GetDIB() command. The revision number acts as a reference to the PECI specification document applicable to the processor client definition. Please refer to Section 2.5.2.2 for details on GetDIB response formatting.

2.5.3.3Client Addressing

The PECI client assumes a default address of 0x30. The PECI client address for the processor is configured through the settings of the SOCKET_ID[1:0] signals. Each processor socket in the system requires that the two SOCKET_ID signals be configured to a different PECI addresses. Strapping the SOCKET_ID[1:0] pins results in the client addresses shown in Table 2-17. These package strap(s) are evaluated at the assertion of PWRGOOD (as depicted in Figure 2-49). Refer to the appropriate Platform Design Guide (PDG) for recommended resistor values for establishing non-default SOCKET_ID settings.

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