IBM Intel Xeon E5506 46M1079 User Manual

Product codes
46M1079
Page of 154
Intel
®
 Xeon
®
 Processor 5500 Series Datasheet, Volume 1
109
Thermal Specifications
6.3.1.3
Processor Interface Tuning and Diagnostics
Intel Xeon processor 5500 series Intel IBIST allows for in-field diagnostic capabilities in 
Intel QuickPath Interconnect and memory controller interfaces. PECI provides a port to 
execute these diagnostics via its PCI Configuration read and write capabilities.
6.3.2
Client Command Suite
6.3.2.1
Ping() 
Ping() is a required message for all PECI devices. This message is used to enumerate 
devices or determine if a device has been removed, been powered-off, etc. A Ping() 
sent to a device address always returns a non-zero Write FCS if the device at the 
targeted address is able to respond. 
6.3.2.1.1
Command Format
The Ping() format is as follows:
Write Length: 0
Read Length: 0
An example Ping() command to PECI device address 0x30 is shown below.
6.3.2.2
GetDIB()
The processor PECI client implementation of GetDIB() includes an 8-byte response and 
provides information regarding client revision number and the number of supported 
domains. All processor PECI clients support the GetDIB() command.
6.3.2.2.1
Command Format
The GetDIB() format is as follows:
Write Length: 1
Read Length: 8
Command: 0xf7
Figure 6-9. Ping()
Byte #
Byte 
Definition
0
Client Address
1
Write Length
0x00
2
Read Length
0x00
3
FCS
Figure 6-10. Ping() Example
Byte #
Byte 
Definition
0
0x30
1
0x00
2
0x00
3
0xe1