However, it might be done with the internal crystal of the atmega328p.
He told me that i needed to design the RFID system that includes chip and coil and integrate it to our main PCB.
Is it possible to design or is there any already designed schematic for PCB's which can act as MIFARE CLASSIC ?
But i couldn't find the components of mfrc522 seperately
Is it possible to send data to rfid tag circuitry from the atmega328p ?