The PaLFI (passive low frequency interface) combines a low frequency transponder with an SPI interface and power management for a connected MSP430. This video provides an overview of the kit and includes three demonstrations.

PaLFI (passive low frequency interface) Main Page: http://www.ti.com/palfi

Datasheet for PalFI TMS37517: http://focus.ti.com/lit/ds/symlink/tms37157.pdf

Microcontroller: http://focus.ti.com/mcu/docs/mcuhome.tsp?sectionId=101&am...

The TMS37157 combines a Low Frequency Transponder Interface with an SPI Interface and Power
Management for a connected microcontroller. It is the ideal device for any Configuration, Data Logger-, Sensoror
Remote Control Application. The Transponder memory is accessible through SPI and LF and, in the second
case, operates without the need for a battery. The use of the Low Frequency Band ensures a communication in
a defined direction and harsh environments.
The TMS37157 manages the Transponder communication and push button interaction. During sleep state the
devices enters a special low power mode with only 60 nA current consumption.
The EEPROM memory is accessible over the LF interface without support from the battery or through SPI by a
microcontroller if a battery is connected. The TMS37157 offers a special battery charge mode.
The external resonance circuit with a LF coil and a resonance capacitor can be trimmed to the correct resonance frequency with the integrated trimming capability achieving an easy way to eliminate part tolerances. The small RSA 16-pin package together with only a few external components results in a cost efficient design. (less info)