The BCM20203T512 has been developed to address Near Field Communication (NFC) and Radio Frequency Identification (RFID) tagging applications working to the ISO/IEC 18092, ISO/IEC 21481, and ISO/IEC 14443A standards.
The two-terminal BCM20203T512 IC, when connected to a loop antenna, produces a passive
NFC/RFID tag operating in the standard unlicensed 13.56 MHz frequency band.
The read/write data in the BCM20203T512 memory is EEPROM-based, allowing for multiple read/write cycles. Individual blocks of memory can be locked into read-only operation by contactless command.
Once selected, blocks or areas of memory are locked to be read-only; the process is irreversible.
The BCM20203T512 is based on a physical EEPROM array size of 512 bytes.

FEATURES
• Compliant with the Type 1 tag format, which has been mandated by the NFC Forum
• Targeted for operation with NFC devices which work to ISO/IEC 18092 (NFCIP-1) and ISO/IEC 21481 (NFCIP-2)
• Designed to be compatible with the ISO/IEC 14443:2001, Parts 2 and 3
• ISO/IEC 14443 Type A modulation scheme
• Passive RFID tag operating in the unlicensed 13.56 MHz band
• Read and write (R/W) operation
• 8-byte read and 8-byte write commands
• Can be configured for One Time Programmable (OTP) and Write Once Read Many (WORM) operation
• Fast data communication rate of 106 kbps
• UID provision to enable collision detection by use of the Read UID (RID) command.
• Protection for data during the write operation by the BCM20203T512, only responding to commands prepended with a matching UID. Also provides combo cards protection in the situation where there are multiple tags present.
• Data communications are protected by 16-bit CRC integrity checking
• EEPROM based user read/write memory area organized as blocks of 8 bytes
• 7 bytes of Unique Identification (UID) number for use in data authentication/anticloning
• 480 bytes of user read/write memory
• 64 bits (8 bytes) of OTP memory
• All memory areas are individually one time lockable by RF command to prevent further modification of data and to produce read-only functionality

The two NFC CARD have NFC function equipment link, realize point-to-point data transmission. Based on the model. Multiple which has the function of N FC digital cameras, PDA, computer, mobile phone can be wirelessly to realize data exchange between subsequent associated application is the local application can also be a web application. Typical applications of the model are to assist quickly establish a bluetooth connection, exchange, mobile phone card and data communication, etc.