AMD Athlon 6 Specifications download pdf (Page 95)

Product Errata 95

Revision Guide for AMD Athlon™ 64 and AMD Opteron™ Processors

25759 Rev. 3.79 July 2009

181 Asserting LDTSTOP_L Before DRAM is Initialized May Cause

System Hang

Description

After power up (cold reset), the link frequency is set to 200 MHz, the link width is set to 8, and the

processor core frequency may be set below its maximum rated setting. The link frequency and width

adjustments can be accomplished using warm resets or LDTSTOP_L. Using LDTSTOP_L for link

frequency and width adjustments prior to DRAM initialization may cause the system to hang.

Potential Effect on System

The system may hang.

Suggested Workaround

BIOS can use warm reset to adjust link frequency and width settings instead of LDTSTOP_L. If

LDTSTOP_L is used, then BIOS must set DRAM Configuration Low[DisInRcvrs] to 1 (Dev

2x090h[24] = 1) and set DRAM Configuration High[MCR] to 1 (Dev 2x094h[25] = 1) prior to

generating LDTSTOP_L.

Fix Planned

Yes

1 2 ... 90 91 92 93 94 95 96 97 98 99 100

No comments

AMD Athlon 6 Specifications Page 95