Overview
●The NTAG I2C plus combines a passive NFC interface with a contact I2C interface. Designed to be the perfect enabler for NFC in home-automation and consumer applications, this connected NFC tag is the fastest, least expensive way to add tap-and-go connectivity to just about any electronic device.
●These devices maintain full backward compatibility with first-generation NTAG I2C, while adding advanced features for password protection, full memory-access configuration from both interfaces, and an originality signature for protection against cloning.
●MoreLess
●## Features
●### Key features
● Pass-through mode
● Up to 40 kbit/s using 64 byte SRAM buffer
● Energy harvesting
● Up to 15 mW
● Wake up host with field detect pin
● Password protection
● 32-bit password to restrict access to EEPROM and SRAM
● Originality signature
● 32-byte elliptic curve based originality signature to protect cloning
●### NFC interface
● Interoperability
● Fully ISO/IEC 14443 A compliant
● Fully NFC Forum Type 2 Tag compliant
● One to one backward compatible to NTAG I2C
● Uniqueness
● 7-byte Unique Identifier (according to ISO/IEC 14443-3)
● GET_VERSION command for easy identification of chip type and supported features
● 32-byte originality signature
● ISO/IEC 14443 and NFC Forum Type 2 Tag features
● Operating distance up to 100 mm
● True anti-collision
● 4-byte write operation in < 4.8 ms to EEPROM and < 0.8 ms to SRAM
● 64-byte write operation (FAST_WRITE) in < 6.1ms to SRAM
●### I2C interface
● Features
● I2C slave interface supports up to 400 kHz
● 16-byte write operation in < 4.5 ms to EEPROM and < 0.4 ms to SRAM
● Device maybe used as standard I2C EEPROM or I2C SRAM
●### Security
● NFC Forum Type 2 Tag features
● 7-byte Unique Identifier
● One time programmable Capability Container
● Read-only locking
● Special features
● Elliptic curve based originality signature
● 32-bit password protection
● Protected data can be safeguarded against limited number of negative password authentication attempts
● Access restriction from I2C perspective
● Pass-through and mirror mode operations may be password protected
●### Memory
● Built-in memory
● 1912 or 888-bytes freely available user memory area
● 64-bytes SRAM
● Specification
● 20 years data retention
● 500.000 write cycles
