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st25r3916b full power antenna

SG3
Associate II

‎2024-11-22 01:24 AM

Hi,

I am using the st25r3916b to read cards (ISO14443A) and as card emulator. I am not sure if I am using the maximum antenna power. If you could give the clue of which registers and which values should I use to have it with the maximum output power.

Thanks,

 

Sandra

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1 REPLY 1
Ulysses HERNIOSUS
ST Employee

‎2024-11-22 05:40 AM

Hi Sandra,

 

maximum output power is mainly a function of: 

  1. Antenna and matching impedance
  2. Driver resistance setting (d_res) - make sure it is at lowest value (lowest resistance)
  3. Power supply / regulator settings / regulator bypass. Depends on your supply voltage and stability what you can/want to use. From software perspective reg_s/rege settings. 

 

Best Regards, Ulysses

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