AR# 13781

Virtex-II, XCITE/DCI - What is the slew rate or drive strength of LVDCI I/O?

Description

What is the slew rate and drive strength of LVDCI I/O?

Solution

The slew rate attribute (FAST/SLOW) is not used with DCI.

IBIS simulation will show what the resulting slew rate looks like in your actual environment. Slew rate is a lesser issue when the line is matched. It is still an issue with crosstalk and ground bounce; however, you will find that the slew rate is slower in the DCI cases, making these issues less severe.

Drive strength is automatically resolved, so the impedance is matched.

AR# 13781
Date 01/31/2013
Status Active
Type General Article