Thermal Specifications
6.3.1.2
6.3.1.3
Platform Manageability
PECI allows full read access to error and status monitoring registers within the
processor’s PCI configuration space. It also provides insight into thermal monitoring
functions such as TCC activation timers and thermal error logs.
Processor Interface Tuning and Diagnostics
The Intel Xeon Processor E7-8800/4800/2800 Product Families processor Intel IBIST
allows for in-field diagnostic capabilities in Intel QPI 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
Figure 6-6. Ping()
Byte #
0
1
2
3
Write Length
0x00
Read Length
0x00
Client Address
FCS
Byte
Definition
An example Ping() command to PECI device address 0x30 is shown below.
Figure 6-7. Ping() Example
Byte #
0
1
2
3
Byte
0x30
0x00
0x00
0xe1
Definition
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.
Datasheet Volume 1 of 2
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INTEL [ INTEL ]
