Ask questions and find answers on ST25 NFC/RFID tags and readers, including connectivity implementations and antenna design.
Hello! We have this chip, see in image. We think this is ST33Gххх in package UFDFN8 4.2 × 4 mm.This is from NFC interface. The main question is that what is this chip model?And the second question is, i dont found pins names in ST33G documentation.
Hello ~!, I am bringing up a board using ST25R3916.The main chip is arm9 family and based on freertos.The basic operation has been confirmed, but there is a problem that certain NFCA cards are not recognized well.It does not mean that it cannot be r...
Hello,We are able to detect and read NFC tags with ST25R3920, but we have a little problem. When we are trying to read an NFC tag that is in a phone case (credit card, ID card etc.) we can't get a reading at all. Our first guess was that mobile phone...
Hello,i need for FCC the parameter "RF Power conducted" of the product ST25R3911b.
Hey is there a Factory-Programm to upload if i mess everything up. For the ST25R3911B-DISCO board ?I want to be able to use The GUI again.
All,BackgroundChip: ST25R3914Library: RFAL for ST253911BI am currently working on a project that uses the ST25R3914 nfc chip and would like to implement the Automatic Antenna Tuning (AAT) feature. After looking at the data sheet, it states that chip ...
According to the ST25DVi2c datasheet, a high bitrate encoding has four subcarrier pulses (followed or preceded by 9.44us of unmodulated time) to designate a 0 or 1. A low bitrate uses 16 pulses and 37.76us of unmodulated time.By changing bits 3 and 4...
Hello, We are trying to make an NFC reader for door access control. Reading NFC tags and Android phones are as expected. But for Apple product we have to support Apple VAS. I found a similar question https://community.st.com/s/question/0D53W00001MY8k...
The chip type I am using is st25r3915. After I port RFAL, when I use "ST25R_SELFTEST" in "ST25NFC_EMBEDDED_LIB_ST25R3911B_1.4_0", the result of "Check IRQ Handling" is "ERR_TIMEOUT", what is the possible reason?
I want to power the ST25DV tag using a pin of the micro (VCC_EEPROM). In my idea, the micro should power it only when there has been a writing on the TAG's EEPROM. I would like to implement this by monitoring GPO, but I'm not sure if this functionali...