Ask questions and find answers on ST25 NFC/RFID tags and readers, including connectivity implementations and antenna design.
Hello dear,We received a product of ST25R3911B-AQFT, it shows COO Thailand, but we check the PCN paper, the lable should be ST25R3911B-AQWT, but the actual lable is ST25R3911B-AQT, is it normal and correct? Thanks a lot.
I have two questions.(1) Regarding an external crystal oscillator.For the ST25R3916B, is it necessary to have an external 27.12MHz crystal between XTI and XTO? Also, are there any points to note when selecting a crystal?(2) Regarding the design of th...
For my setup, I am using a nucleo-L476RG and a NFC08A1. I am wanting to learn bare metal programming to really grasp micro controller programming. I have programmed some smaller bare metal programs, SPI, I2C, etc on the nucleo. Now, I am trying to...
I am currently working on a project that involves reading NFC tags using the NFC X-NUCLEO-NFC08A1 extension, which utilizes the ST25R3916 NFC reader connected to an STM32 Nucleo-G0B1RE platform.Having completed the hardware interfacing for SPI commun...
Hi everyone,Has anyone experienced issues with the NFC tag becoming unreachable via I2C? During debugging, I noticed a HAL timeout when waiting for the tag's response after setting the address to the EEPROM, static, or dynamic register. Additionally,...
Hi ST team,We’re using the ST25R3918 in a low-power BLE+NFC product. During testing, we noticed unexpected ~10 µA additional current draw when the chip was in Power-Down mode (with all VDD rails active), despite expecting ~1–2 µA per the datasheet.Af...
Hello,I’m currently working on NFC detection using the ST25R3917 with Felica.My system configuration is as follows:PC Application ⇔ USB to I2C ⇔ ST25R3917I’m running RFAL in the PC application and have extended rfal_platform.c to control the USB to I...
Hi there, I have a brand new STEVAL-25R3916B main board for my project which require NFC capabilities and Bluetooth (BLE) v5.x conectivity. According the user guide [User guide - Page 5] on the rear side of the board there is room for a bluethooth mo...
We are currently seeking layout recommendations for the ST25R3916 and ST25R3918 chips.On the Transmitter Side:ST25R3916B → Power Amplifier → Matching Circuit → AntennaOn the Reciever Side:Antenna → Matching Circuit →Power Harvester → ST25R3918The imp...
Hello,I would like to confirm the correct procedure for measuring antenna impedance using a NanoVNA. The chip under test is the ST25R3916.I came across the post titled "How to Measure Antenna Parameters According to AN4974 with NanoVNA," which was ve...
