AM335 IBIS Model - DDR3 Phy - Read Cycle

Siddharth Gupta84 said:

Kindly suggest for Read Operations from DDR3, which drive strength should be selected

(1.6\1.33\1.14\1\0.88\0.80\0.73\0.67  *Rext)?

Well, "drive strength" is probably not quite accurate when discussing reads.  The "impedance" would be a better term.

And in terms of which should be selected, well, that's the goal of your IBIS analysis. You need to simulate the waveforms and then determine the best settings.

Siddharth Gupta84 said:

What does the highlighted part stand for in the model (5PER_1P5)??

5%, 1.5V

Please read this wiki page if you have not already done so:

http://processors.wiki.ti.com/index.php/How_to_use_the_AM335x_IBIS_Models

It explains how to decode the parameters and how they relate back to registers.