PECI Interface
60 Thermal/Mechanical Specifications and Design Guide
Note: The 2-byte parameter field and 4-byte read data field defined in Figure 7-8 are sent in
standard PECI ordering with LSB first and MSB last.
7.1.2.4.2 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.
Figure 7-8. RdPkgConfig()
13
Byte
Definition
Byte #
02
13
Index LSB Parameter MSB
10
Host ID[7:1] &
Retry[0]
11
Read Length
{0x02, 0x03, 0x05}
8
7
Cmd Code
0xa1
6
12
FCS
Client Address
Completion
Code
5
LSB Data (1, 2 or 4 bytes) MSB
4
14
Write Length
0x05
9
FCS
Table 7-4. RdPkgConfig() Response Definition
Response Meaning
Bad Write FCS Electrical error
Abort FCS Invalid command formatting (mismatched RL/WL/Command Code)
CC: 0x40 Command passed, data is valid.
CC: 0x80
Response timeout. The processor is 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 Request
CC: 0x91
PECI control hardware, firmware or associated logic error. The processor is unable to
process the request.
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