Specifications

Product Errata 127
Revision Guide for AMD Family 10h Processors
41322 Rev. 3.84 August 2011
417 Processor May Violate Tstab for Registered DDR3-1333 DIMMs
Description
Prior to asserting CKE during self-refresh exit, the processor may not provide a stable MEMCLK for
the DIMM Tstab period of 6 microseconds. While MEMCLK is running for over 6 microseconds, one
or more missing pulses may exist. The processor provides at least 4.2 microseconds of stable
MEMCLK in DDR3-1333 mode, and has no violation at all lower MEMCLK frequencies.
This violation only applies to registered DDR3-1333 operation only. This violation does not occur
during DRAM initialization. It may occur only when the system exits DRAM self-refresh mode when
DLL shutdown is enabled (DRAM Configuration Low Register[DisDllShutdown] (F2x[1,0]90[27])
is 0b).
Potential Effect on System
No adverse issues have been observed. If a DDR3 DIMM is sensitive to this issue, the system may
fail to exit self-refresh.
Suggested Workaround
None required.
Fix Planned
No