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MSP430F2272: Powering up after battery is dead using RF

Ali Aljumaili
Prodigy 250 points

Part Number: MSP430F2272
Other Parts Discussed in Thread: RF430FRL152H, RF430CL330H

star-oHi,

I'm designing a data storage tag based on the MSP430 which interfaces with multiple sensors and store the data on an external flash memory chip. This tag is put inside of a cyclical hydrophone and filled epoxy so it won't be possible to physically change the battery.

I am looking for a solution that can power up the MSP430 and the flash memory for enough time to retrieve the data. I was inspired by this company's method star-odi communcation box which can communicate wirelessly using RF as well to power up the tag if it is dead. Is there any TI products that can achieve this functionality, if so could you recommend them to me for future reading.

Thank you in advance.

  • 0
    TI__Mastermind 30610 points
    Hey Ali,

    MSP430's are low power micro controllers, so they can extend your battery life. Unfortunantly, your question is more focused on the RF interface and tag, so the community here might not be able to give much input. Luckily, I did support these types of product several year ago, so I can give you a little info. :)

    NFC/RFID is probably your best option: www.ti.com/.../nfc-rfid.html

    Those animal tags are usually Low Frequency RF Tags. The benefit was that they could be powered via the RF field and read from a decent distance of a few feet or via a large "gate" set in the water. This was a big business for us 10-20 years ago, but we no longer produce many of these products.

    Now, NFC (Near Field Communication) is probably your best option. This is High Frenquency RFID, so the range is much shorter (maybe ~3 inches max) but TI does offer a few products that could fit your application. The interface transponder, RF430CL330H, or the Sensor Transponder, RF430FRL152H, may work for you.

    There are a few batteryless design where a FRAM based MSP430 is powered from the NFC field.

    Data logger: www.ti.com/.../TIDA-00217
    Temp patch: www.ti.com/.../TIDM-RF430-TEMPSENSE

    Hope this points you in the right direction!

    JD

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