Max SD/microSD card that can be read/written by 8-bit MCU

Discussion in 'Embedded Systems and Microcontrollers' started by allahjane, Sep 23, 2012.

  1. allahjane

    Thread Starter Member

    Sep 19, 2012

    I'm going to interface a SD/micro-SD card with an 8-bit AVR MCU. Before I buy a card for the purpose I need to know the size of the card that i can use with the MCU .

    Also please advice me if there are any trade-offs like size vs speed..

    thank you
  2. kubeek


    Sep 20, 2005
    AFAIK there is no big difference between SDs and SDHCs, you should be able to use any capacity you like. The speed will definitely be limited by the speed that your AVR can do and not by the card, so no worry about that one.
    I don´t think there is any trade off between size or speed. Just if you plan to dump the card contents through the avr into a serial port or something like that it will take ages, even for something small like a 512MB card.
  3. t06afre

    AAC Fanatic!

    May 11, 2009
    It is a book "Sd Card Projects Using the Pic Microcontroller" by Dogan Ibrahim. I know you are not using PICs;). But the topic is thorough discussed on a general basis. Throughout the book. So if you can get the book free (from the library). It could be worth reading