MikroElektronika
NFC Tag 2 click
NFC Tag 2 click
SKU:MIKROE-2462
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NFC Tag 2 click carries the NT3H1101 NTAG I2C energy harvesting NFC Forum Type 2 Tag from NXP. The click is designed to run on a 3.3V power supply only. It communicates with the target MCU over I2C interface and the INT pin (field detection) on the mikroBUS™ line.
NT3H1101 NTAG I2C and energy harvesting
NT3H1101 NTAG I2C - energy harvesting NFC Forum Type 2 Tag with field detection pin.
An additional externally powered SRAM mapped into the memory allows a fast data transfer between the RF and I2C interfaces and vice versa, without the write cycle limitations of the EEPROM memory.
The FD (field detection) LED is turned ON when an NFC field is detected. Power is generated from the RF field of an NFC device. For example, the NFC Tag 2 click can be powered by your mobile phone. This eliminates the need for an external power supply or a battery.
At room temperature, NT3H1101 NTAG I2C could provide typically 5 mA at 2 V on the VOUT pin of NT3H1101 which is attached to the FD LED.
How it works
The NT3H1101 NTAG I2C which can be found on NFC Tag 2 click is the first product of NXP’s NTAG family offering both contactless and contact interfaces.
In addition to the passive NFC Forum compliant contactless interface, the IC features an I2C contact interface, which can communicate with a microcontroller if the NT3H1101 NTAG I2C is powered from an external power supply.
An additional externally powered SRAM mapped into the memory allows a fast data transfer between the RF and I2C interfaces and vice versa, without the write cycle limitations of the EEPROM memory.
Additional resources
NFCWorld+ keeps an up-to-date, accurate and exhaustive list of NFC-supported phones.
Specifications
Type | RFID,NFC |
On-board modules | NT3H1101 NTAG I2C |
Key Features | NT3H1101 NTAG I2C, data transfer of 106 kbit/s, NFC Forum Type 2 Tag compliant, energy harvesting |
Interface | I2C |
Input Voltage | 3.3V |
Compatibility | mikroBUS |
Click board size | L (57.15 x 25.4 mm) |
Pinout diagram
This table shows how the pinout on NFC Tag 2 click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
OnBoard LEDs
Designator | Name | Type | Description |
---|---|---|---|
LD1 | PWR | LED | Indicates the power is on. |
LD2 | FD | LED | Field Detection indication. |
Programming
Code examples for NFC Tag click, written for MikroElektronika hardware and compilers are available on Libstock.
Code snippet
This code snippet demonstrates the writing of an NDEF message on NFC Tag 2 click.
01 void write_ndef( void ) 02 { 03 uint8_t ndef_rec[] = { 0x03, // NDEF Message 04 15, // Message size 05 0xD1, // Record header 06 1, // Type Length - 1 byte 07 11, // Payload Length - 11 bytes 08 'U', // Type / URI 09 0x01, // Payload 10 'm', 'i', 'k', 'r', 'o', 'e', '.', 'c', 'o', 'm', 11 0xFE }; // NDEF Message End Mark 12 memset( NT2_click.user_memory, 0, 888 ); 13 nfctag2_memory_write( 0, NT2_click.user_memory, 888 ); 14 nfctag2_memory_write( 0, ndef_rec, sizeof( ndef_rec ) ); 15 }




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