Device Discovery; Client Addressing; Socket Id Strapping - Intel BX80619I73820 Design Manual

PECI Interface
In the event that the processor is tri-stated using power-on-configuration controls, the
PECI client will also be tri-stated. Processor tri-state controls are described in the
relevant sections of the Datasheet listed in
®
Figure 7-44. Intel Core™ i7-3960X, i7-3970X Processor Extreme Edition, Intel
3930K Processor, and Intel
Timeline()
PWRGOOD
RESET_N
Core execution
PECI Client
Status
SOCKET_ID[1:0]
7.1.5.2

Device Discovery

The PECI client is available on all processors. The presence of a PECI enabled processor
in a processor socket can be confirmed by using the Ping() command described in
Section 7.1.2.1. Positive identification of the PECI revision number can be achieved by
issuing the GetDIB() command. The revision number acts as a reference to the PECI
specification document applicable to the processor client definition. Refer to
Section 7.1.2.2
7.1.5.3

Client Addressing

The PECI client assumes a default address of 0x30. The PECI client address for the
processor is configured through the settings of the SOCKET_ID[1:0] signals. Each
processor socket in the system requires that the two SOCKET_ID signals be configured
to a different PECI addresses. Strapping the SOCKET_ID[1:0] pins results in the client
addresses shown in
of PWRGOOD (as depicted in
The client address may not be changed after PWRGOOD assertion, until the next power
cycle on the processor. Removal of a processor from its socket or tri-stating a processor
will have no impact to the remaining non-tri-stated PECI client addresses.
Table 7-18. SOCKET ID Strapping
SOCKET_ID[1] Strap
Thermal/Mechanical Specifications and Design Guide
®
Core™ i7-3820 Processor PECI Power-up
In Reset
In Reset
Data Not Ready
X SOCKET ID Valid
for details on GetDIB response formatting.
Table 7-18. These package strap(s) are evaluated at the assertion
Figure
SOCKET_ID[0] Strap
Ground
Ground
V
TT
V
TT
Table 1-1.
idle
Reset uCode
Available except core
services
7-44).
Ground
V
TT
Ground
V
TT
®
Core™ i7-
running
Boot BIOS
Fully Operational
PECI Client Address
0x30
0x31
0x32
0x33
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