2024-07-31 12:45 AM
Hello,
I inherited a ST25R3916B design with two antennas.
I need to change the design to one antenna interface.
Is there any detailed schematic with ST25R3916B and one antenna?
Thanks
Shay
2024-07-31 01:37 AM - edited 2024-07-31 01:38 AM
For example, you can orientate yourself on the design of the X-NUCLEO-NFC08A1, which works with one antenna.
Hope that helps?
Good luck!
/Peter
2024-07-31 03:33 AM
Hi Peter,
The above design uses the device two channels (RFO1/2 and RFI 1/2), I thought there is an implementation with one channel as in the DS (see below).
Is it better to use the two channels with one antenna?
Thanks
Shay
2024-07-31 05:16 AM
You can drive the antenna either differential or single. As you mentioned, the X-NUCLEO-NFC08A1 works differentially, which is why RFO1/2 and RFI1/2 are used. If you want to use single driving, you only use either RFO1/RFI1 or RFO2/RFI2 and set the corresponding bits (IO configuration register 1, bits 7 and 6).
Hope that helps?
Regards
/Peter