Near field communication (NFC) is a very short range wireless point to point interconnection technology. It enables users of handheld electronic devices to access content and services in an intuitive way by simply touching smart objects that is connecting devices, just by holding them next to each other. The communication is based on the inductive coupling.
NFC is the technology which is aimed to use with mobile phones. And there are some more application which could be possible in future like:
Electronic ticketing, identity documents, electronic keys etc.
Block diagram of Near Field Communication Technology (NFC)
The smart NFC interface sets its NFC transceiver to target mode and waits for the active NFC device, when it is detected the inbuilt temperature sensor is powered on and after a small stabilization time the temperature sensor output is sampled. The result is converted into the degree Celsius and sent by NFC transceiver as an ASCII character string.
The smart NFC interface has a single 8-bit microcontroller. An 8-Mbit flash memory is connected to the SPI bus of the microcontroller. This is used for data logging. A real time clock circuit is equipped here to enable recording of timestamps and serving as a wakeup timer. A multipurpose power supply circuitry is used, which fetch power not only from the internal battery but also from the RS-232 serial port. The general purpose IO (GPIO) is can be used for connecting the sensor.
|
