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I'd suggest checking the thread below found in our embedded communities, User (CPC1311) was also using the SerDes flashless mode and looking for input configuration file.
According to Carlos A of embedded communities, the configuration file can be found in document #513655 and this requires Privileged account.
Please check the steps below for updating your Embedded Design Center account to Privileged type:
To request an upgrade from your Basic EDC account to a Privileged account:
1. go to http://www.intel.com/content/www/us/en/embedded/embedded-design-center-support.html 2. click on “Manage Your Intel Profile” found in the “Manage Your Account” section of the page.
In case you have additional question, kindly post in our embedded communities thread.
Hope this helps.