AMD Phenom 8650 Triple-Core HD8650WCGHBOX User Manual
Product codes
HD8650WCGHBOX
30
Product Errata
41322
Rev. 3.16 February 2008
Revision Guide for AMD Family 10h Processors
269 ITT Specification Exceeded During Power-Up Sequencing
Description
Processor current consumption may exceed the ITT maximum specified for C0/S0 operation if the
VTT voltage regulator is enabled before the VDDIO voltage regulator and the VDDIO regulator
enables a low resistance path to VSS while VTT - VDDIO > 400 mV.
VTT voltage regulator is enabled before the VDDIO voltage regulator and the VDDIO regulator
enables a low resistance path to VSS while VTT - VDDIO > 400 mV.
Potential Effect on System
The VTT voltage regulator may shut down if ITT exceeds the platform design limit.
Suggested Workaround
None required if either of the following are true:
•
The VTT regulator is enabled at the same time or after the VDDIO regulator.
•
The VDDIO regulator does not enable a low resistance path to VSS while VTT - VDDIO >
400 mV.
400 mV.
For affected systems, the VTT voltage regulator should be enabled at the same time or after the
VDDIO voltage regulator during power-up power sequencing. Existing specifications limiting the
VDDIO to VTT relationship must be maintained.
VDDIO voltage regulator during power-up power sequencing. Existing specifications limiting the
VDDIO to VTT relationship must be maintained.
Fix Planned
No