Texas Instruments announced the first member of a new product class featuring a passive low frequency interface (PaLFI) device designed to wirelessly supply a low-power MSP430 microcontroller (MCU) with energy to operate, even if the optional battery is empty. For example, PaLFI has the ability to remotely communicate with and power implantable medical devices, making procedures less invasive. Among numerous other potential applications, the device is also being used for production chain or container tracking and end-of-line configuration of electronic equipment such as CD/DVD players and measurement instruments.
The PaLFI device combines a low frequency wireless interface with an SPI interface which ensures stable communication within a well defined activation/communication zone. Upcoming product class releases include derivatives with security/authentication features and cost optimised versions with smaller memory minus the battery charge function for applications such as end-of-line product configuration.
The solution’s battery check and charge function via RF field supports operation of hermetically sealed devices such as implants. PaLFI memory is accessible via an SPI and wireless LF 134 kHz interface, allowing for access to additional microcontroller memory.
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