Hello David Henke, my apologies for the late response, to answer your question,If NXP decides to discontinue the product due to unforeseen circumstances or vital business needs, the discontinuation of the product will be announced and performed according to our “EOL/DOD” process providing also a “last time buy” option to our customers.
In any case customer and NXP will in good faith discuss the need of a discontinuation of the product, as well as elaborate and mutually agree on alternative solutions if those can be offered with reasonable effort by NXP.
also please check the evaluation board CLEV6630A|NXP this might help you to change from 522 to 663.
BR
Jonathan