How do I find Card Enable pin?

Discussion in 'General Electronics Chat' started by fouadalnoor, Oct 24, 2008.

  1. fouadalnoor

    Thread Starter Active Member

    Oct 20, 2008
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    0
    I am trying to connect the pin CS or CE pin from my MMC adapter to my micro controller, but i cant find the card enable pin!:(

    I have loked through the data sheet and cant seem to find a pin which can be used as a card enable pin.

    I have attached my MMC adapter data sheet and my MCU data sheet can be found here:

    http://ww1.microchip.com/downloads/en/DeviceDoc/39564c.pdf,

    hope someone can help me out.

    Thanks.
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    The CS pin on the card can be connected to any digital output of the microcontroller (the important think is that you have to program the uC to make the appropriate function on this pin). This pin enables or disables the card so it just needs a high or low logic applied to it. Be careful to include a voltage divider on the output of the uC to control the CS pin of the card because the card operates at 3.3V unless your uC operates at 3.3 V too.
     
  3. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    The enable pin is assigned by you from one of the digital IO pins in the MCU.

    hgmjr
     
  4. fouadalnoor

    Thread Starter Active Member

    Oct 20, 2008
    30
    0
    Last edited: Oct 25, 2008
  5. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    I don't see the attachments associated with your DAC and your decoder.

    I just see the attachments for the MMC and the PIC.

    hgmjr
     
  6. fouadalnoor

    Thread Starter Active Member

    Oct 20, 2008
    30
    0
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