I have received an email from the NXP as below:
Dear customer,
Thanks for your interest in NXP Docstore.
For a successful registration a Nondisclosure Agreement – NDA - between your company and NXP is required: please provide this if available or contact your local NXP support team for setting one up.
Thanks in advance
but how can I set up the Nondisclosure Agreement ?
Hello TaoLiang
Please kindly contact with your local authorized distributor , they will forward your project information and request to local NXP sale/marketing team and help arrange to sign NDA for you.
Kindly go to below URL , select country/city to find the contact list of our authorized distributor.
https://www.nxp.com/support/sample-buy/distributor-network:DISTRIBUTORS
Please do not hesitate to contact us.
Thank you
Becky