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CC2640R2F: Non volatile data storage

user4917812
Prodigy 80 points

Part Number: CC2640R2F

I need to save data somewhere that I can reach after the controller wakes up from "shutdown" mode. 
The SRAM does not keep its memory in "shutdown" mode

Its only two bytes that I need to save (actually only five bits) and it needs to be accessible immediately after the controller wakes up from "shutdown" mode.

Have tried to save it in FLASH but due to that the device is battery powered we have a huge power drop when erasing/writing to flash.

We also have an external serial EEPROM but this is too slow since we need the data immediately after the controller leaves the "shutdown mode":

Regards

Örjan

  • 0
    TI__Guru** 105180 points
    Hello Ørjan,

    Since the CC2640R2F is a flash based microcontroller, retaining data across power cycles requires storing the data in on chip flash or externally. One option could be to use external SPI RAM, but the retention current on those devices could be more than keeping the CC26xx in standby (1uA with RCOSC configuration).

    Best wishes
  • 0 in reply to JXS
    Prodigy 80 points
    Thanks for the fast response.

    Guessed that this was the case but I hoped that I had missed something in the specification :)