MC56U032DCCA Datasheet, PDF (32/64 Pages) Samsung semiconductor – Dual Voltage MultiMediaCard Specification

MultiMediaCard^TM
CMD55 ac
[31:16] RCA R1
[15:0] stuff
bits
APP_CMD
CMD56 adtc [31:1] stuff
R1b
bits.
[0]: RD/WR
GEN_CMD
block is set by the SET_BLOCK_LEN
command.
Indicates to the card that the next command
is an application specific command rather
than a standard command
These Samsung MultiMediaCard do not
support this command
Used either to transfer a data block to the
card or to get a data block from the card for
general purpose / application specific
commands. The size of the data block shall
be set by the SET_BLOCK_LEN command.
These Samsung MultiMediaCard do not
support this command
Note :
1. CID register consists of 128 bits (starting with MSB, it is preceded by an additional start bit, ends with an end bit)
2. CSD register consists of 128 bits (starting with MSB, it is preceded by an additional start bit, ends with an end
bit)
3. This command is indicating the busy status of the MultiMediaCard via the data channel.
4. The default block length is as specified in the CSD.
5. The data transferred must not cross a physical block boundary unless RD_BLK_MISALIGN is set in the CSD.
6. The data transferred must not cross a physical block boundary unless WRITE_BLK_MISALIGN is set in the CSD.
7. 32 write protection bits (representing 32 write protect groups starting at the specified address followed by 16
CRC bits are transferred in a payload format via the data line. The last (least significant) bit of the protection bits
corresponds to the first addressed group. If the addresses of the last groups are outside the valid range, then the
corresponding write protection bits shall be set to zero.
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