Mikroelektronika d.o.o.
Carte à clic NFC Tag 2
Carte à clic NFC Tag 2
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La carte NFC Tag 2 Click Board™ est équipée de la balise NFC Forum Type 2 de récupération d'énergie I2C NT3H1101 NTAG de NXP. La carte Click Board™ est conçue pour fonctionner uniquement sur une alimentation de 3,3 V.
Le NFC Tag 2 Click Board™ communique avec le MCU cible via l'interface I2C et la broche INT (détection de champ) sur la ligne MikroBUS.
The NFC Tag 2 Click Board™ carries the NT3H2111 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.
NT3H2111 NTAG I2C AND Energy Harvesting
NT3H2111 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, NT3H2111 NTAG I2C could provide typically 5 mA at 2 V on the VOUT pin of NT3H2111 which is attached to the FD LED.
How Does The NFC Tag 2 Click Board™ Work?
The NT3H2111 NTAG I2C which can be found on the NFC Tag 2 Click Board™ 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 NT3H2111 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 |
| Applications | The NFC Tag 2 Click Board™ is perfectly suited for NFC applications which require energy harvesting NFC Forum Type 2 Tag |
| On-board modules | NT3H2111 NTAG I2C energy harvesting NFC Forum Type 2 Tag from NXP |
| Key Features | NT3H2111 NTAG I2C could provide typically 5 mA at 2 V on the VOUT pin of NT3H2111 which is attached to the FD LED, externally powered SRAM mapped into the memory allows a fast data transfer between the RF and I2C interfaces and vice versa |
| Interface | I2C |
| Compatibility | mikroBUS |
| Click board size | L (57.15 x 25.4 mm) |
| Input Voltage | 3.3V |
PINOUT DIAGRAM
This table shows how the pinout of the NFC Tag 2 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
| Notes | Pin |  |
Pin | Notes | |||
|---|---|---|---|---|---|---|---|
| NC | 1 | AN | PWM | 16 | NC | ||
| NC | 2 | RST | INT | 15 | FD | Field detection output | |
| NC | 3 | CS | TX | 14 | NC | ||
| NC | 4 | SCK | RX | 13 | NC | ||
| NC | 5 | MISO | SCL | 12 | SCL | I2C Clock | |
| NC | 6 | MOSI | SDA | 11 | SDA | I2C Data | |
| Power supply | +3.3V | 7 | 3.3V | 5V | 10 | NC | |
| Ground | GND | 8 | GND | GND | 9 | GND | Ground |
ONBOARD LEDS
| Designator | Name | Type | Description |
|---|---|---|---|
| LD1 | PWR | LED | Indicates the power is on. |
| LD2 | FD | LED | Field Detection indication. |
Software Support
Code examples for the NFC Tag 2 Click Board™, written for MikroElektronika hardware and compilers are available on Libstock.
CODE SNIPPET
This code snippet demonstrates the writing of an NDEF message on the NFC Tag 2 Click Board™.
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 }
Carte à clic NFC Tag 2
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