Hi Kewal,
The Processor Expert provides verification of conflicts in the routed pins. It means, that you cannot configure routing of the same pin for two and more device. For example, you cannot configure routing of the same pin for ADC and UART in a project.
You can create a new project for K64 derivative and generate all source code files. The source code (board configuration) can be used in your application and other projects. You just must ensure that the board support configuration files will be used in compatible projects (compatible IO maps, headers files and so on).
For example, if you create a project for K64 in KDS 3.0.0 (Processor Expert project with KSDK 1.2.0) you must use the generated board support configuration files in project that contains KSDK 1.2.0 IO maps and other required definitions.
Best Regards,
Marek Neuzil