MC2GH256NMCA-2SA00 SAMSUNG [Samsung semiconductor], MC2GH256NMCA-2SA00 Datasheet - Page 43

• Manufacturer Part Number: MC2GH256NMCA-2SA00
• Description: SAMSUNG MultiMediaCard
• Manufacturer: SAMSUNG [Samsung semiconductor]

All data communication in the Data Transfer Mode is point-to point between the host and the selected card (using
addressed commands). All addressed commands get acknowledged by a response on the CMD line.
The relationship between the various data transfer modes is summarized below (see Figure 6-2):
• All data read commands can be aborted any time by the stop command (CMD12). The data transfer will terminate and
• All data write commands can be aborted any time by the stop command (CMD12). The write commands must be
• As soon as the data transfer is completed, the card will exit the data write state and move either to the Programming
• If a block write operation is stopped and the block length and CRC of the last block are valid, the data will be pro
• The card may provide buffering for stream and block write. This means that the next block can be sent to the card while
• If all write buffers are full, and as long as the card is in Programming State (see MultiMediaCard state diagram
• There is no buffering option for write CSD, write CID, write protection and erase. This means that while the card is busy
• Parameter set commands are not allowed while card is programming.
• Read commands are not allowed while card is programming.
• Moving another card from Stand-by to Transfer State (using CMD7) will not terminate a programming operation. The
• A card can be reselected while in the Disconnect State, using CMD7. In this case the card will move to the Program
• Resetting a card (using CMD0 or CMD15) will terminate any pending or active programming operation. This may
• Prior to executing the bus testing procedure (CMD19, CMD14), it is recommended to set up the clock frequency used
In the following format definitions, all upper case flags and parameters are defined in the CSD (Chapter 5.5.3), and the
other status flags in the Card Status (Chapter 6.9).
Revision 0.3
the card will return to the Transfer State. The read commands are: block read (CMD17), multiple block read (CMD18)
and send write protect (CMD30).
stopped prior to deselecting the card by CMD7. The write commands are: block write (CMD24 and CMD25), write CID
(CMD26), and write CSD (CMD27).
State (transfer is successful) or Transfer State (transfer failed).
grammed.
the previous is being programmed.
Figure -2), the DAT0 line will be kept low.
servicing any one of these commands, no other data transfer commands will be accepted. DAT0 line will be kept low as
long as the card is busy and in the Programming State.
Parameter set commands are: set block length (CMD16), and erase group selection (CMD35-36).
card will switch to the Disconnect State and will release the DAT0 line.
ming State and reactivate the busy indication.
destroy the data contents on the card. It is up to the host’s responsibility to prevent this.
for data transfer. This way the bus test gives a true result, which might not be the case if the bus testing procedure is
performed with lower clock frequency than the data transfer frequency.
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MultiMediaCard
Sep.22.2005
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