Scratchpad.md

@@ -81,6 +81,13 @@ Facilities: Cloud storage, warehouse space, lab access
 Parts: Controllers, crystals, connectors, and displays
 ```
 
+## Nearfield radio
+
+Use the 4€_CLRC66303HNE_ or _CLRC66303HNY_ instead of _CLRC6630(1|2)_ for increased voltage range and features.
+
+https://www.nxp.com/video/nfc-software-integration-iii-how-to-port-the-nfc-reader-library-to-k64f:PORT-NFC-READER-LIBRARY-K64F  
+https://www.nxp.com/design/training/design-your-nfc-antenna-with-nxps-om29263adk-development-kit:TIP-ANTENNA-DESIGN-OM29263ADK
+
 ## Secure elements
 
 Consider integrating a Google Titan secure element as well as the Opentitan software.