JMY6021 series are RFID reader/writer module with IIC, UART or USB ports. There are 2 SAM card slots in the module which supports SAM cards compliant with ISO7816 (T=0 and T=1) fully. JMY6021 has various functions and supports multi ISO/IEC standard of contactless cards. The designer combined some frequent used command of RF card and then user could operate the cards with full function by sending simple command to the module.
    The module has a length of 506 bytes command buffer could send APDU over 256 bytes to T=CL smart cards and SAM cards. The modules support FSDI=8 of ISO14443-4. The module and antenna is integrated. The impedance between RF circuit and antenna was tuned by impedance analyzer, and then the module has excellent performance and stability.