Intel L7555 AT80604004875AA User Manual

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Intel® Xeon® Processor 7500 Datasheet, Volume 1

pop-up to C0 varies by product SKU, the C-state from which the pop-up is initiated, 
and the negotiated T

BIT

.

The PECI client is always guaranteed to be operational under S0 and S1 sleep states. 
Under S3 and deeper sleep states, the PECI client response is undefined and, therefore, 
unreliable.

The Intel® Xeon® processor 7500 series PECI client is fully reset on all RESET_N 
assertions. Upon deassertion of RESET_N, where power is maintained to the processor 
(otherwise known as a ‘warm reset’), the following are true:

• The PECI client assumes a bus Idle state.
• The Thermal Filtering Constant is retained.
• The GetTemp() reading resets to 0x0000.
• Any transaction in progress is aborted by the client (as measured by the client no 

longer participating in the response).

• The processor client is otherwise reset to a default configuration.

Ping()

Not measurable

GetDIB()

Not measurable

GetTemp()

Not measurable

PCIConfigRd()

Requires a package ‘pop-up’ to a C0 state

PCIConfigWr()

Requires a package ‘pop-up’ to a C0 state

MbxSend()

Requires a package ‘pop-up’ to a C0 state

MbxGet()

Not measurable

Ping()

Fully functional

GetDIB()

Fully functional

GetTemp()

Fully functional

PCIConfigRd()

Fully functional

PCIConfigWr()

Fully functional

MbxSend()

Fully functional

MbxGet()

Fully functional