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Indu,
you might want to refer these docs.
http://focus.ti.com/general/docs/lit/getliterature.tsp?literatureNumber=spruev8&fileType=pdf
http://focus.ti.com/general/docs/lit/getliterature.tsp?literatureNumber=spruev9&fileType=pdf
link for dm6446 resources
http://focus.ti.com/docs/prod/folders/print/tms320dm6446.html