Intel Xeon 3.20GHz Processor RK80546KG0882MM User Manual

 

 

 

22 

DC Endpoints 

Edgefingers: Hi 

Edgefingers: Low 

Daisy 

Chain 

# of © 

per chain 

Hi 

Low 

+I 

+V 

-V 

-I 

42 

16 

E28  

Y28  

A8  

A7  

A122  

A121  

43 

10 

D29  

N29  

A10  

A9  

A34  

A33  

44 

8 

AA29  

N29  

A146  

A145  

A34  

A33  

45 

10 

C30  

N30  

A12  

A11  

A32  

A31  

46 

10 

AB30  

N30  

A144  

A143  

A32  

A31  

47 

12 

A31  

N31  

A16  

A15  

A30  

A29  

48 

12 

AD31  

N31  

A140  

A139  

A30  

A29  

This section provides a guideline for the instruments used to take the measurements.  

Note:  The instrument selection should consider the guidelines in EIA 364-23A.  

1.  These measurements use a 4-wire technique, where the instruments provide two separate 

circuits. One is a precision current source to deliver the test current. The other is a precision 
voltmeter circuit to measure the voltage drop between the desired points.  

2.  These separate circuits can be contained within one instrument, such as a high quality micro-

ohmmeter, a stand-alone current source and voltmeter, or the circuits of a data acquisition 
system.  

3.  Measurement accuracy in Ω is specified as ± 0.1% of reading, or ± 0.1 mΩ, whichever is 

greater. The vendor is responsible for demonstrating that their instrument(s) can meet this 
accuracy.  

4.  Automation of the measurements can be implemented by scanning the chains through the 

edge or cable test connector using a switch matrix. The matrix can be operated by hand, or 
through software.  

5.  Measure R

Total

 for each daisy chain of “package + socket + motherboard” unit.  

6.  Measure R

jumper

 for each daisy chain of 30 “package + motherboard” units. Calculate 

 

for each daisy chain (There is 30 data for each daisy chain).  

7.  For each socket unit, calculate  

 

R

Req

 is the average contact resistance for socket pin.