New “Dynamic NFC Tag” Memories from STMicroelectronics Enable Smarter Consumer Appliances
Add NFC capability to any kind of electrical device, from loudspeakers and printers, to cookers and washing machines
A vast range of consumer devices, domestic appliances and industrial equipment is set to become smarter,
more flexible and easier to use because of a new family of “dynamic NFC tag” memories from STMicroelectronics.
These memories make it easy to add Near Field Communications (NFC) capability to any kind of electrical device,
from loudspeakers and printers, to cookers and washing machines, to electricity, gas and water meters.
NFC is a wireless communications technology that allows two devices to communicate when they are in close proximity, typically just a few inches from each other. Today, it is mostly recognized by consumers as a way to make contactless purchases with smartphones. Soon it will contribute to connecting objects to the “Internet of Things”, which will change the way consumers interact with those connected things. Although NFC capability is standard in many new smartphones and tablets, the time is coming for NFC connectivity in many other kinds of electrical or electronic devices.
ST aims to drive this change with its new M24SR family of “dynamic NFC tag” memories that allow any device, including printers, fitness watches, microwave ovens, smart electricity meters or digital cameras to feature built-in NFC connectivity, thereby allowing it to communicate with a smartphone that almost touches it.
“The key benefit of embedding NFC capability into almost any kind of equipment or device is that the device can then be designed to offer all the features that would be possible if they had keyboards, graphic displays and Internet connections, without actually having to incorporate these expensive and space-consuming features into the equipment itself; the user's smartphone already has them and can 'lend' them,” says Benoit Rodrigues, General Manager, STMicroelectronics Memories Division.
One of the potential benefits enabled by the M24SR family is convenient Bluetooth pairing of a smartphone and an audio device. Instead of having to open the phone's settings, turn Bluetooth on, select the audio device code name and sometimes enter a pass code, users can simply wave their smartphone by the NFC-enabled audio device, and automatically activate Bluetooth pairing between the two devices as settings have been transmitted over NFC.
Other examples include resetting the clock on any appliance after a power blackout or a change in daylight saving hours, or rapid diagnosis of faults in malfunctioning equipment. Instead of having to look for the instruction manual or call the manufacturer's customer service, the user could simply run the “Reset my appliance clock” or “Diagnose Problem” app on their smartphone, touch the equipment with the smartphone, and the clock would be automatically reset or the problem remotely diagnosed through the connection to the manufacturer's website.
“The M24SR family enables a new paradigm in how to interact with the world around us,” said Benoit Rodrigues. “Today, smartphones are increasingly at the center of how we interact with other people. Tomorrow, they will also be at the center of how we interact with everything we own or use.”
The M24SR02-Y device is a dynamic NFC/RFID tag IC with a dual interface embedding an EEPROM.
It can be operated from an I²C interface or by a 13.56 MHz RFID reader or from an NFC phone.
The I²C interface uses a two-wire serial interface, consisting of a bidirectional data line and a clock line.
It behaves as a slave in the I²C protocol.
Features of the M24SR02-Y 2-Kbit Dynamic NFC/RFID tag
- I²C interface
- Two-wire I²C serial interface supports 1 MHz protocol
- Single supply voltage: 2.7 V to 5.5 V
- Contactless interface
- NFC Forum Type 4 Tag
- ISO/IEC 14443 Type A
- 106 Kbps data rate
- Internal tuning capacitance: 25 pF
- 256-byte (2-kbit) EEPROM
- Support of NDEF data structure
- Data retention: 200 years
- Write endurance:
- 1 million cycles at 25 °C
- 600 k cycles at 85 °C
- Read: up to 246 bytes in a single command
- Write: up to 246 bytes in a single command
- 7-byte unique identifier (UID)
- 128-bit passwords protection
- 8-lead small-outline package (SO8) ECOPACK2
- TSSOP8 ECOPACK2
- UFDFPN8 ECOPACK2
- Digital pad
- GPO: configurable general purpose output
- RF disable: activation/deactivation of RF commands
- Temperature range
- From - 40 °C up to 85 °C
The company's Web site address is www.st.com.
[Reprinted with kind permission from STMicroelectronics]