Ask questions and find answers on ST25 NFC/RFID tags and readers, including connectivity implementations and antenna design.
Posted on May 02, 2018 at 14:34Hi,I am developing a product based on the AS3993, AKA ST25RU3993. I have been using the FEMTO module (by AMS) to test my application code.So far I was able to verify the initialization, SPI, interrupt line, cristall st...
I am using x-nucleo-nfc03a1 on the nucelo-f446re board and i can't figure out why i keep getting a NAK value of 04 when trying to use sendrecv function. cr95hf's is always response: 90 4 4 24 0 0.0A is defined in documentation as ACK and 00 as NAK a...
PWM1 control has block address F8 but i have access only to first 252 bytes (area 1 and 2)63blocks. Response from reader "Statusbyte:...0x95 Reader: ISO-Error ISO-Error = 0x10
Hello everyone ,I have my own PCB which its antenna connection is so similar to ST25R3911B-Disco - MB1325C-01 board , but my cpu is st32f407 , and base on ST25R3911B_DISCO_FW_v1_2_00 and also stm8_nfc05 I want to read UID at the first step .rfalIniti...
I have a CR95HF transceiver connected over SPI interface running at 2MHz. When I send the protocol select command I get the error 0x71 (EinternalError) .The IRQ_OUT goes after the 4-th byte low .Clock, MISO, MOSI looks ok.Send data 00 02 02 01 0dGet ...
Hi,We have developed a NFC reader design using the CR95HF-VMD5T chip. Our design is similar to the X-NUCLEO-NFC03A1 development board, its just we have used a flex NFC antenna by PulseLarsen with part number W7001.The issue we are facing is that the...
When trying to frequency hop on the main PLL, I observe a lock time of ~150ms. This seems quite high and I can't find any more information in the datasheet on the matter. Is anyone able to verify the PLL lock time?
I am able to read the tag but the rage is very less. Are there any gain settings to be changed the software. I am enabling external power amplifier still i am getting very less range. Please suggest me which type of antenna is better to use. What wil...
Edit: I solved the problem, it was my own fault! The Operation Control Register's bit 7 was set to 0 when it should have been set to 0. Thanks!--------------------------------------------------------------Hello all,I am working with the ST25R3911B di...
Hi. Is there a compatibility list of mobile phones and NFC chips, like M24SR? I tried to connect to M24SR on my Samsung S6 - no luck! Same problem on latest Samsung and IPhone X. However, Blackberry PRIV recongizes it. May be, it is due to 14443-4 st...