Ask questions and find answers on ST25 NFC/RFID tags and readers, including connectivity implementations and antenna design.
Hello people. In 2020, our company made a PCB prototype (designed by me) which included a chip " ST25R95-VMD5T ". Our results were not good, but maybe this was due to a poor filter circuit and due to a poor matching circuit. The tag reading distance ...
Hello,I am using the ST25R3918 controlled by an MCU via RFAL, operating in NFC-F / FeliCa card emulation mode.I am monitoring the efd_o bit (bit 6) of the Auxiliary Display Register (Address: 31h) to detect when the board approaches an external reade...
Hello,I have an ST25DV64KC chip and I’m having a problem with I2C read/write. The I2C bus is running at 100 kHz and is functional (communication with another sensor, SHT, on the bus works fine). I am also able to communicate with this NFC chip - I ca...
Hi everyone,I’m trying to interface an ST25R100 NFC reader with my MCU, and I’m having trouble reading ISO15693 tags. My initialization seems to work, but I never get any response from the tag. I’m hoping someone can spot what I might be missing.This...
Hello,I got back to my issues from this post.I was able to connect wires to SPI lines, and get the measurements to logic analyzer. These are the results:Logic2 screenshot Now i can see that the issue is the CS line, but i dont know why it is being ch...
Hello everyone,I am developing an iOS application using the ST25SDK (converted/wrapped for Swift) to interface with the M24LR16E-R Dynamic NFC Tag.I am facing a blocking issue where any attempt to call readBytes() (which is used in TagReadMemoryGenVi...
I'm developing a new secret card project using STM32L476RG and X-NUCLEO-NFC07A1 board, I plan to let the secret card to store private key and do signature related tasks. I'm not sure where can I get blank card which contains the same MCU with STM32L4...
Hello ST Community,We are developing an iOS application using the ST25SDK (Swift) to interact with a device equipped with the ST25DV02K-W1 (Dual Interface EEPROM).Our Goal: We need to configure the PWM parameters to control an Adjustable Output Curre...
I am working with the X-NUCLEO-NFC04A1 expansion board (based on the ST25DV04K) and I have some questions regarding the Energy Harvesting (EH) capabilities.My Setup:Hardware: X-NUCLEO-NFC04A1 connected to a host MCU. Observation: When measuring the V...
Hi, I'm performing for a customer a signal integrity simulation involving ST25R200 (SPI interface). Is there any IBIS model available for this component (or ST25R100)? Thanks, RegardsRoberto