Intel C2518 FH8065501516710 Data Sheet

Product codes
FH8065501516710
Page of 746
Volume 2—High Precision Event Timer (HPET)—C2000 Product Family
Architectural Overview
Intel
®
 Atom™ Processor C2000 Product Family for Microserver
Datasheet, Vol. 2 of 3
September 2014
542
Order Number: 330061-002US
28.3.4
Timer Accuracy
1. The timers are accurate over any 1-ms period to within 0.05% of the time specified 
in the timer resolution fields.
2. Within any 100-ms period, the timer reports a time that is up to two ticks too early 
or too late. Each tick is less than or equal to 100 ns, so this represents an error of 
less than 0.2%.
3. The timer is monotonic. It does not return the same value on two consecutive 
reads (unless the counter has rolled over and reached the same value).
The main counter is clocked by the 14.31818-MHz clock. The accuracy of the main 
counter is as accurate as the 14.31818-MHz clock.