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Product Errata 47

Revision Guide for AMD Family 10h Processors

41322 Rev. 3.16 February 2008

319 Inaccurate Temperature Measurement

Description

The internal thermal sensor used for CurTmp (F3xA4[31:21]), hardware thermal control (HTC),

software thermal control (STC), and the sideband temperature sensor interface (SB-TSI) may report

inconsistent values.

Potential Effect on System

HTC, STC and SB-TSI do not provide reliable thermal protection. This does not affect THERMTRIP.

Suggested Workaround

None. Systems should be designed with conventional thermal control and throttling methods or

utilize PROCHOT_L functionality based on temperature measurements from an analog thermal diode

(THERMDA/THERMDC).

Systems should not rely on the HTC features, STC features or use SB-TSI.

Software should not modify HtcTmpLmt (F3x64[22:16]) or enable any of the STC features by setting

StcPstateEn, StcApcTmpLoEn, StcApcTmpHiEn, StcSbcTmpLoEn, or StcSpcTmpHiEn

(F3x68[5,3:0]).

Fix Planned

Yes

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AMD HD8650WCGHBOX Fiche technique Page 47