Can some one please help me in understanding the answer to my following questions? --- 1. what is meant by pulse width modulation and what is motion control pulse width modulation? 2. what is the use of ICDI? not fullform? 3. what is meant by RoHS status of micro controller and how is it used? 4. what is meant by pitch header and how microcontroller signals are routed to pitch headers?
I presume you mean a Launchpad by Texas Instruments (TI)?
For specific information about TI products, you should be asking TI!
"1. what is meant by pulse width modulation"
www.lmgtfy.com
"and what is motion control pulse width modulation?"
That would be PWM applied to motion control
"2. what is the use of ICDI? not fullform?"
That is a TI term. It's their name for their debug interface.
"3. what is meant by RoHS status of micro controller and how is it used?"
"4. what is meant by pitch header and how microcontroller signals are routed to pitch headers?"
I think you are misreading something there.
a "header" is a connector - usually consisting of rows of pins. The "pitch" refers to the spacing between pins; eg,
a 0.1"-pitch header has pins on a 0.1" (tenth of an inch) spacing;
a 2mm-pitch header has pins on a 2mm spacing;
etc, etc,...