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Intel® Xeon® Processor E5-1600 v2/E5-2600 v2 Product Families 37
Datasheet Volume One of Two
Interfaces
Note: The 2-byte parameter field and 4-byte write data field defined in Figure 2-11 are sent in standard PECI
ordering with LSB first and MSB last.
2.5.2.5.2 Supported Responses
The typical client response is a passing FCS, a passing Completion Code and valid data.
Under some conditions, the client’s response will indicate a failure.
2.5.2.6 Package Configuration Capabilities
Table 2-6 combines both read and write services. Any service listed as a “read” would
use the RdPkgConfig() command and a service listed as a “write” would use the
WrPkgConfig() command. PECI requests for memory temperature or other data
generated outside the processor package do not trigger special polling cycles on the
processor memory or SMBus interfaces to procure the required information.
Figure 2-11. WrPkgConfig()
Table 2-5. WrPkgConfig() Response Definition
Response Meaning
Bad Write FCS Electrical error or AW FCS failure
Abort FCS Illegal command formatting (mismatched RL/WL/Command Code)
CC: 0x40 Command passed, data is valid.
CC: 0x80 Response timeout. The processor was not able to generate the required response in a
timely fashion. Retry is appropriate.
CC: 0x81 Response timeout. The processor is not able to allocate resources for servicing this
command at this time. Retry is appropriate.
CC: 0x90 Unknown/Invalid/Illegal Request
CC: 0x91 PECI control hardware, firmware or associated logic error. The processor is unable to
process the request.