Specifications

Product Errata 81
Revision Guide for AMD Family 10h Processors
41322 Rev. 3.84 August 2011
339 APIC Timer Rollover May Be Delayed
Description
The APIC timer does not immediately rollover when it transitions to zero and Timer Local Vector
Table Entry[Mode] (APIC320[17]) is configured to run in periodic mode. In addition, when Timer
Local Vector Table Entry[Mask] (APIC320[16]) is configured to generate an interrupt, the interrupt is
also delayed whether configured for periodic or one-shot mode.
The per rollover error that may be observed is between 35 and 90 ns.
Potential Effect on System
None expected. The standard use of the APIC timer and the level of accuracy required does not make
the error significant.
Suggested Workaround
None required.
Fix Planned
No