AMD Sempron 10 Dokumentacja Pobierz pdf (Strona 73)

Product Errata 73

Revision Guide for AMD Family 10h Processors

41322 Rev. 3.84 August 2011

319 Inaccurate Temperature Measurement

Description

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

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

may report inconsistent values.

For CPUID Fn0000_0001_EAX[7:4] (Model) 4 and higher, this temperature inconsistency will occur

only on AM2r2, Fr2, Fr5 and Fr6 package processors

Potential Effect on System

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

THERMTRIP or the use of the STC-active state using StcPstateLimit or StcPstateEn (F3x68[30:28,

5]).

Suggested Workaround

None. Platforms that accept AM2r2, Fr2 (1207), Fr5 (1207) or Fr6 (1207) package processors 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). These systems should not rely on the HTC features, STC thermal zone

features, or use SB-TSI.

When (((CPUID Fn8000_0001_EBX[PkgType, bits 31:28] == 1 (AM2r2 or AM3)) &&

(F2x[1, 0]94[Ddr3Mode, bit 8] == 0)) || (CPUID Fn8000_0001_EBX[31:28] == 0 (F (1207)))),

software should not modify HtcTmpLmt (F3x64[22:16]), utilize the value from CurTmp, or enable

any of the STC thermal zone features by setting StcThrottEn, StcApcTmpLoEn, StcApcTmpHiEn,

StcSbcTmpLoEn, or StcSpcTmpHiEn (F3x68[4,3:0]).

Fix Planned

Yes

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AMD Sempron 10 Dokumentacja Strona 73