purpose lock switch sdhc card

Discussion in 'General Electronics Chat' started by aamirali, Oct 11, 2012.

  1. aamirali

    Thread Starter Member

    Feb 2, 2012
    what is the purpose of lock switch.

    I read that even if card is locked but if Device want to write on it, it can write.
    Its just card reader which don't write until it see switch closed.

    If yes, how to check from MCU, that if lock switch is closed or open
  2. BMorse

    Senior Member

    Sep 26, 2009
    There are siwtches in some sd card sockets that have a card present and write protect outputs.