Hirdetés

Új hozzászólás Aktív témák

  • RoundRobin

    aktív tag

    válasz azbest #15109 üzenetére

    Na, találtam is erről valamit:

    "Identification of Multiple Cards:

    Up to 30 MultiMediaCard™ can be used on the same bus. The method of selecting the card to be accessed from among a number of cards is as follows for each mode.

    1.MMC mode
    In MMC mode, in order to select a particular card for access from among a number of cards, a relative address RCA (relative card address: see section 2.4, Registers) corresponding to a unique name is assigned to each card during the identification procedure, and a card is selected by specifying this relative address.

    2.SPI mode
    In SPI mode, a chip select signal (CS) is connected to each card, and the card to be accessed is
    selected by asserting the chip select signal for that card to the low level."

Új hozzászólás Aktív témák