Intel E5-4600 manual WrPkgConfig Response Definition Sheet 1, Electrical error or AW FCS failure

Read Length: 0x01

Command: 0xa5

AW FCS Support: Yes

Description: Writes data to the processor PCS entry as specified by the ‘index’ and ‘parameter’ fields. This command supports only dword data writes on the processor PECI clients. All command responses include a completion code that provides additional pass/fail status information. Refer to Section 2.5.5.2 for details regarding completion codes.

The Assured Write FCS (AW FCS) support provides the processor client a high degree of confidence that the data it received from the host is correct. This is especially critical where the consumption of bad data might result in improper or non-recoverable operation.

Figure 2-11. WrPkgConfig()

Note: The 2-byte parameter field and 4-byte write data field defined in Figure 2-11are sent in standard PECI ordering with LSB first and MSB last.

2.5.2.5.2Supported 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.

Table 2-5. WrPkgConfig() Response Definition (Sheet 1 of 2)

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.

Intel® Xeon® Processor E5-1600/E5-2600/E5-4600 Product Families	37
Datasheet Volume One