8.3Level 3 Debug (Voltage References)
Table 25 includes the first items to look at when debugging a board that is not booting.
Table 25. | Level 3 Debug (Voltage Reference) |
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| Step | Test | Pass/Fail Criteria | Cause of Failure |
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| 1 | MCH DDR2 Channel A Vref | 0.9 V | Vref incorrect: check resistor values |
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| 2 | MCH DDR2 Channel B Vref | 0.9 V | Vref incorrect: check resistor values |
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| 3 | MCH Hublink Vref | 0.354V | Vref incorrect: check resistor values |
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| 4 | MCH Hublink Vswing | 0.804V | Vswing incorrect: check resistor values |
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| 5 | ICH Hublink Vref | 0.347V | Vref incorrect: check resistor values |
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| 6 | ICH Hublink Vswing | 0.696V | Vswing incorrect: check resistor values |
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| 7 | CPU0 VTT Vref | 0.775V | Vref incorrect: check resistor values |
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| 8 | CPU1 VTT Vref | 0.754V | Vref incorrect: check resistor values |
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| 9 | MCH VTT Vref | 0.775V | Vref incorrect: check resistor values |
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User’s Manual | April 2007 |
58 | Order Number: |
