ST25 NFC/RFID tags and readers

Ask questions and find answers on ST25 NFC/RFID tags and readers, including connectivity implementations and antenna design.

cancel
Showing results for 
Search instead for 
Did you mean: 

Forum Posts

Resolved! ST25R3911 Long time to read tag

I want to trigger a RFID reading at certain intervals using ST25R3911 and from this I want a RFID reading to be done within 1 second. When I try this in RFAL (using democode for polling): err = rfalNfcDiscover( &discParam ); if( err != RFAL_ERR_NONE ...

RFlod.2 by Associate III
  • 346 Views
  • 4 replies
  • 0 kudos

Resolved! ST25R3911B Power supply

I have PCB which support 3.3 V or 4 V power supply which I want to connect with ST25R3911B. I want to run 4V power supply as it can provide more current and I assume outputpower of ST25R3911B  will be higher on 4 V than on 3.3 V.In data sheet of ST25...

RFlod.2 by Associate III
  • 398 Views
  • 7 replies
  • 0 kudos

Resolved! ST25R3911B Power Sequencing

In my design VDD = 2.9V and VDD_IO = 2.0V.  To minimize current when the NFC feature is not needed, I want to power down the VDD supply.  But I want to leave VDD_IO powered on.  Is there a concern with VDD being powered up and down repeatedly while V...

KevinB by Associate II
  • 342 Views
  • 5 replies
  • 1 kudos

Resolved! rfalST25xVPollerReadConfiguration() called fail

hi,st25r200 read configuration of  st25tv02k tag via  rfalST25xVPollerReadConfiguration()  ,but always fail. Error code is 05.However, st25r200 can read and write user data block of the  tag correctly.Could anyone give me an example of using this fun...

zh1 by Associate II
  • 457 Views
  • 4 replies
  • 1 kudos

Resolved! Interrupt problem with ST25DV64KC

I'm trying to change from ST25DV16K board to ST25DV64KC and use it.The board setup part seems to be fine, but there's a problem with the interrupt setup part.When writing data to the EEPROM of the tag board with RF from NFC08A1, the code that worked ...

GOODTHINK by Associate III
  • 956 Views
  • 9 replies
  • 0 kudos

Resolved! ST25R3916 reading single byte from register not working after putting the device in "Ready mode"

Hello,I am working on a project where I need to read the UID of an NFC tag using the ST25R3916 and communicate via I2C. After powering on, I can successfully read single register, but after setting the device to "Ready mode" by setting bit 7 of the O...

cle_98 by Associate
  • 208 Views
  • 1 replies
  • 0 kudos

Resolved! STEVAL-25R200SA Transparent Mode Implementation

I'm working with the STEVAL-25R200SAand trying to implement Transparent Mode to directly receive raw data from the MISO line. I've followed the datasheet and configured everything as per the documentation, but I'm still not receiving any data.Setup a...

Resolved! ST25R3911B VDD Range

This seems like an "easy" topic, yet I'm struggling to get a clear understanding.Section 3.2 of the datasheet (Operating Conditions) defines a single, wide range for VDD (2.4V to 5.5V).  But Section 1.3.2 (IO Configuration Register 2) defines two non...

KevinB by Associate II
  • 354 Views
  • 4 replies
  • 1 kudos