Intel
®
Core™ 2 Duo Processor and Intel
®
Core™ Duo Processor with Intel
®
E7520 Chipset Development Kit
January 2007
User’s Manual
Order Number: 316068-001US
63
Intel
®
Core™ 2 Duo Processor and Intel
®
Core™ Duo Processor with Intel
®
E7520 Chipset
Development Kit
8.3
Level 3 Debug (Voltage References)
Table 29
includes the first items to look at when debugging a board that is not booting.
Table 29. Level 3 Debug (Voltage Reference)
Step
Test
Passing Criteria
Cause of Failure
1
MCH DDR2 Channel A Vref
0.9 V
Vref incorrect: check resistor values
2
MCH DDR2 Channel B Vref
0.9 V
Vref incorrect: check resistor values
3
MCH Hublink Vref
0.354 V
Vref incorrect: check resistor values
4
MCH Hublink Vswing
0.804 V
Vswing incorrect: check resistor values
5
ICH Hublink Vref
0.347 V
Vref incorrect: check resistor values
6
ICH Hublink Vswing
0.696 V
Vswing incorrect: check resistor values
7
CPU0 VTT Vref
(back side of board)
0.775 V
Vref incorrect: check resistor values
8
CPU1 VTT Vref
(back side of board)
0.754 V
Vref incorrect: check resistor values
9
MCH VTT Vref
0.775 V
Vref incorrect: check resistor values