Intel Xeon Guidelines

Intel® Xeon™ Processor with 512 KB L2 Cache System Compatibility Guidelines
8
6.0 V
CC
Power Sequencing
As outlined in Section 4.0, a 3.3 volt power supply must be connected to the Intel®
Xeon™ processor with 512 KB L2 cache SM_VCC pins (AE28 & AE29). SM_VCC is the
supply voltage used for the SMBus functions and for the VID output signal circuits. The
VID signals are programmed by Intel during the manufacturing process so that the VRM
output voltage will be set correctly. As indicated in Figure 1, the VID outputs will be valid
within 10 milliseconds after the time at which the 3.3 volt supply reaches 95% of its
nominal value. For a power supply that adheres to the ATX12V power supply design
guidelines, PWR_OK will be generated no less than 100 milliseconds after all of its
outputs reach their respective 95% values (please refer to the document ATX/ATX12V
Power Supply Design Guide). Similarly, for a power supply that adheres to the Server
System Infrastructure (SSI) power supply specification, PWR_OK will be generated no
less than 100 milliseconds after all of its outputs are within their respective regulation
limits (please refer to the document MPS Power Supply: A Server System Infrastructure
(SSI) Specification For Midrange Chassis Power Supplies).PWR_OKmaybeusedto
enable the output of the VRM (V
CC
) using the OUTEN signal. The VRM PWRGD output,
in conjunction with the rest of the system’s powergood logic, may be used to generate the
U30 RSVD V
SS
Processor Ground
U31 RSVD V
CC
Processor Power
V1 RSVD V
SS
Processor Ground
V30 RSVD V
CC
Processor Power
V31 RSVD V
SS
Processor Ground
W1 RSVD V
CC
Processor Power
W30 RSVD V
SS
Processor Ground
W31 RSVD V
CC
Processor Power
Y1 RSVD V
SS
Processor Ground
Y30 RSVD V
CC
Processor Power
Y31 RSVD V
SS
Processor Ground
AA1 RSVD V
CC
Processor Power
AA30 RSVD V
SS
Processor Ground
AA31 RSVD V
CC
Processor Power
AB1 RSVD V
SS
Processor Ground
AB30 RSVD V
CC
Processor Power
AB31 RSVD V
SS
Processor Ground
AC30 RSVD V
SS
Processor Ground
AC31 RSVD V
CC
Processor Power
AD30 RSVD V
CC
Processor Power
AD31 RSVD V
SS
Processor Ground
Table 1. 603-Pin Socket Pin-Map Change
Pin Old Name New Name Comment

Intel Xeon Specifications

General

Brand	Intel
Model	Xeon
Category	Processor
Language	English