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A
Anu
Visitor II
March 28, 2020
Question

COIN CELL BATTERY

  • March 28, 2020
  • 3 replies
  • 1359 views

Hi,

I am working on STM32F407VGT6 DISCOVERY BOARD , here i want to place a coin cell battery and my doubt is, does the board contain an external super capacitor and where can i design a coin cell battery.......please help me to sort out this problem

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    3 replies

    V
    Vincent H
    Explorer
    March 31, 2020

    Not sure you'll get an answer to this one,

    "does the board contain an external super capacitor" is a bit of an oxymoron.

    Plus, this board requires a 5V power supply, and as far as I know most coin cell batteries are 1.5 or 3V.

    Do you have an EE in your team ?

    W
    waclawek.jan
    Super User
    March 31, 2020

    Maybe @Anu wants to power the RTC and/or backup SRAM from the coin cell, through the VBAT pin... but it's upon him/her to explain what exactly are the requirements.

    JW

    O
    Ozone
    Explorer
    March 31, 2020

    I think a look at the schematics should reveal the answer - no, there is no super capacitor at the original F4 discovery board.

    And it would be useful for adding the coin cell (identifying/checking the pins).

    I suppose it is clear to the OP that the board cannot be powered by the coin cell, it is only for RTC/backup RAM.

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