HOW DOES IT WORK?

NTAG 5 Link Click as its foundation uses the NTP5332, a highly integrated NFC IC optimized for sensor-driven applications that act as a bridge between an NFC-enabled device and any I2C slave from NXP Semiconductors. This highly integrated NFC IC creates a secure, standard-based link from the device to the cloud, in a future-proof way to address and even power sensors. Operating at 13.56 MHz, the NTP5332 is an NFC Forum Type 5 Tag, which can be read and written by an NFC-enabled device at close range and an ISO/IEC 15693-enabled industrial reader over a more extended range (>60cm).

With NTAG 5 Link, the device can connect to the cloud with a single tap. The connection uses an NFC Forum-compliant data exchange mechanism involving SRAM to ensure interoperable data transfers. Also, it offers 2048 bytes of memory divided into three areas where each area can use a different protection level, varying from no protection to 32-/64-bit password-protected read/write access or up to 128-bit-AES mutual authentication protected read/write access. The NTAG 5 Link comes with pre-programmed proof-of-origin functionality to verify authenticity. The ECC-based originality signature can be reprogrammed or locked by the customer through its registers.

This Click board™ communicates with MCU using the standard I2C 2-Wire interface to read data and configure settings, supporting Standard Mode operation with a clock frequency of 100kHz and Fast Mode up to 400kHz. The NTP5332 also offers a transparent I2C master mode, for example, to read sensors without a microcontroller. The RF interface initiates an I2C Master communication, which can trigger a read or write transaction to an external I2C slave. Alongside this feature, an integrated SRAM is used as intermediate data storage. Session registers reflect the status of the I2C Master transaction. Therefore an RF reader has to poll for the status bits related to I2C Master to know the status of the current I2C transaction.

The NTAG 5 Link can also operate as a standalone solution by drawing power from the NFC field of an NFC device. It supports an energy harvesting feature, activated by an onboard switch marked as HARVEST, which means it can supply power to other components in the system, in this case, to supply the NTP5332. NTAG 5 Link can provide a fixed configurable voltage level of 1.8V, 2.4V, or 3V, selectable through register configuration when sufficient energy is available.

In addition, this Click board™ can be placed in a hard power-down mode by setting the HPD pin routed on the RST pin of the mikroBUS™ socket. Besides, it also has an event detection, and field detection functionality that defines the ED pin's behavior routed on the INT pin of the mikroBUS™ socket. This pin's behavior depends on various events such as the presence/absence of the NFC field, arbiter locked/unlocked EEPROM to NFC interface, Write/Read command ongoing, and more.

This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used, as a reference, for further development.

SPECIFICATIONS