Intel C2518 FH8065501516710 Data Sheet

Intel

®

 Atom™ Processor C2000 Product Family for Microserver

September 2014

Datasheet, Vol. 3 of 3

Order Number: 330061-002US

639

Various scenarios for the DDR3 Signals have been simulated to generate a set of layout 

guidelines which are available in the Intel

Platform Design Guide (PDG).

Overshoot (or undershoot) is the absolute value of the maximum voltage above or 

below V

SS

. The overshoot/undershoot specifications limit transitions beyond specified 

maximum voltages or V

SS

 due to the fast signal edge rates. The processor can be 

damaged by single and/or repeated overshoot or undershoot events on any input, 

output, or I/O buffer if the charge is large enough (i.e., if the over/undershoot is great 

enough). Baseboard designs which meet signal integrity and timing requirements and 

which do not exceed the maximum overshoot or undershoot limits listed in 

 ensures reliable I/O performance for the lifetime of the processor.

Magnitude describes the maximum potential difference between a signal and its voltage 

reference level. For the processor, both are referenced to V

SS

. It is important to note 

that the overshoot and undershoot conditions are separate and their impact must be 

determined independently.

The pulse magnitude and duration must be used to determine if the overshoot/ 

undershoot pulse is within specifications.