IBM Intel Xeon E5606 49Y3765 User Manual

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• Assured Write FCS (AW FCS) failure. Note that under most circumstances, an 

Assured Write failure will appear as a bad FCS. However, when an originator issues 
a poorly formatted command with a miscalculated AW FCS, the client will 
intentionally abort the FCS in order to guarantee originator notification.

Some PECI commands respond with a completion code byte. These codes are designed 
to communicate the pass/fail status of the command and also provide more detailed 
information regarding the class of pass or fail. For all commands listed in 

 

that support completion codes, each command’s completion codes is listed in its 
respective section. What follows are some generalizations regarding completion codes.

An originator that is decoding these commands can apply a simple mask to determine 
pass or fail. Bit 7 is always set on a failed command, and is cleared on a passing 
command.

The codes explicitly defined in this table may be useful in PECI originator response 
algorithms. All reserved or undefined codes may be generated by a PECI client device, 
and the originating agent must be capable of tolerating any code. The Pass/Fail mask 
defined in 

 applies to all codes and general response policies may be based 

on that limited information.

0xxx xxxxb

Command passed

1xxx xxxxb

Command failed

0x00..0x3F

Device specific pass code

0x40

Command Passed

0x4X

Command passed with a transaction ID of ‘X’ (0x40 | Transaction_ID[3:0])

0x50..0x7F

Device specific pass code

0x80

Error causing a response timeout. Either due to a rare, internal timing condition or a 

processor RESET condition or processor S1 state. Retry is appropriate outside of the RESET 

or S1 states.

 0x81

Thermal configuration data was malformed or exceeded limits.

 0x82

Thermal status mask is illegal

 0x83

Invalid counter select

 0x84

Invalid Machine Check Bank or Index

 0x85

Failure due to lack of Mailbox lock or invalid Transaction ID

 0x86

Mailbox interface is unavailable or busy

 0x88

Machine Check Banks is currently unavailable (selected core is asleep or unavailable)

 0x89

Invalid Core Select for Machine Check Bank Read

0xFF

Unknown/Invalid Request