Ask questions and find answers on ST25 NFC/RFID tags and readers, including connectivity implementations and antenna design.
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 ...
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...
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...
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...
Hello,I am currently working as a student on designing my own hardware for reading and writing NFC tags. Although I lack experience in RF design, I have completed the electronic design and antenna matching process. My setup includes an STM32U575RGTx ...
Hello,I'm designing a battery powered device with integrated payment terminal. The goal is to pass EMV Level 1 certification.Our approach is very bare metal. We design the board, circuitry and firmware from scratch. No HAL or RFAL is being used. Our ...
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 ...
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...
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...
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...