https://www.psbill.com/smart-card-alliance-release-guide-to-implementing-contactless-payments-for-merchants.html
Accepting contactless payments: a merchant guide is available free at Smart Card Alliance website.
smart cardcontactless paymentsalliancereleaseguide
https://www.nxp.com/design/design-center/development-boards-and-designs/CLRD730
Pegoda CLRD730 reader is a reference design and evaluation reader based on PN7642 NFC controller with a powerful Arm Cortex-M33 microcontroller
contactless smart cardnxp semiconductorsreader