NFC Tag 2 click
PID: MIKROE-2462
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.
Key features
Energy harvesting
NT3H1101 NTAG I2C
o
Contactless transmission of data
o
NFC Forum Type 2 Tag compliant
o
Operating frequency of 13.56 MHz
o
Data transfer of 106 kbit/s
Interface: I2C
3.3V power supply
SPECIFICATION
Product Type
On-board
modules
Key Features
RFid/NFC
NT3H1101 NTAG I2C
NT3H1101 NTAG I2C, data transfer of 106 kbit/s, NFC Forum Type 2 Tag
compliant, energy harvesting
Interface
I2C
Power Supply
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).
Notes
Pin
mikroBUS
tm
Pin
Notes
Not connected NC
1
AN
Not connected NC
2
RST
Not connecred NC
3
CS
Not connected NC
4
SCK
PWM
16
NC Not connected
INT
15 FD
Field detection output
TX
14
NC Not connected
RX
13
NC Not connected
Not connected NC
5
MISO SCL
12 SCL
I2C Clock
Not connected NC
6
MOSI SDA
11 SDA
I2C Data
Power supply
+3.3V 7
3.3V
5V
10
NC Not connected
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.
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
02
03
04
05
06
07
08
09
10
11
12
13
14
15
void
write_ndef(
void
)
{
uint8_t
ndef_rec[]
=
{
0x03,
// NDEF Message
15,
// Message size
0xD1,
// Record header
1,
// Type Length - 1 byte
11,
// Payload Length - 11 bytes
'U',
// Type / URI
0x01,
// Payload
'm', 'i', 'k', 'r', 'o', 'e', '.', 'c', 'o', 'm',
0xFE
};
// NDEF Message End Mark
memset(
NT2_click.user_memory,
0, 888
);
nfctag2_memory_write(
0,
NT2_click.user_memory,
888
);
nfctag2_memory_write(
0,
ndef_rec,
sizeof(
ndef_rec ) );
}
https://shop.mikroe.com/click/wireless-connectivity/nfc-tag-2 2/24/2017
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