ST25 NFC/RFID tags and readers

Resolved! ST25DV64K-IER6S3 - GPO Operation (open drain)

HiI am trying to obtain the smallest possible power consumption with an ST25DV64K-IER6S3 device. I am wondering is the GPO pin is still operational when VCC is removed? Is it the GPO circuit powered by the RF interface?Best RegardsGilberto

Resolved! what to do when you want to password protected write for nfc 5 tag using st25dvXX ?

I am implementing nfc reader and writer application. i am able to write in a tag. But I want password authentication before write what i should do to achieve this.Thanks st community for your Helpful information.

Resolved! Development Kits antenna considerations

Hi,I've noticed that the pcb antenna (ANT300) on ST25R3916-DISCO has the 3rd pin unconnected. The X-NUCLEO-NFC06A1 has this 3rd pin tied to GND. On the other hand, an identical antenna (same dimension and turns that previous one) on X-NUCLEO-NFC05A1 ...

Resolved! Control Impedance trace transmitter and receiver to connector antenna.

Hi everybody, I use chip set ST25R3912-AWLT for NFC design,In PCB layout, i was draw ST25R3912 in main circuit and connect Tx, Rx to antenna use connector.Do i need control impedance trace transmitter and receiver. Thank you,AnhDN

Resolved! why in below code i not get response from ndef tag though i connected ndef tag with st25dv04k ?

#include <stdio.h>#include <sys/ioctl.h>#include <fcntl.h>#include <unistd.h>#include <time.h>#include <netinet/in.h>#include <linux/i2c-dev.h>/* NDEF Text Record */unsigned char NDEF_DATA[] ={/*NDEF Text Record*/0x03, 0x0E, //NDEF message, 14 byte m...

Resolved! Custom antenna performance

Hi,I have designed a 65x85cm 2-turn PCB antenna but I cannot place it close to the damping resistors (I use the ST25R3916 for this). How would the horizontal tracks from the damping resistors to the antenna feed affect its performance, efficiency, fi...

Resolved! Does ST25 able with passive mode?

hello want to sense some analog signal with passive modedoes ST25 able to work with passive mode?since i know that many researchers prefer ST product because of fidelity,really want that want to run project with ST products.can you help me with findi...

Resolved! I bought ST25RU3993-EVAL. I want to be able to read RFID UHF tags from 10m. Which antena I need to buy. Can you send me distributor and name of such antenna.

Resolved! Is the ST25DV64K tag compatible with a ISO14443-A reader?

HiI would like to know if the ST25DV64K tag is going operate with a regular SO14443-A reader? I have already tested the tag against a Samsung S10 phone running the ST's app and is working perfectly. Best RegardsGilberto