MC56U032DCCA Datasheet, PDF (54/64 Pages) Samsung semiconductor – Dual Voltage MultiMediaCard Specification

MultiMediaCard^TM
addressed group.
CMD30
Yes
[31:0] write protect R1
SEND_WRITE_
if the card has write protection
data address
PROT
features, this command asks the
card to send the status of the write
protection bits. ^*5
CMD31
reserved
CMD35
Yes
[31:0]
data R1
TAG_ERASE_
sets the address of the first erase
address
GROUP_START group within a range to be
selected for erase
CMD36
Yes
[31:0]
data R1
TAG_ERASE_
sets the address of the last erase
address
GROUP_END
group within a continuous range to
be selected for erase
CMD38
Yes
[31:0] stuff bits
R1b ERASE
erases all previously selected
sectors
CMD39
No
CMD40
No
CMD41
reserved
CMD42
Yes
[31:0] stuff bits
R1b LOCK/UNLOCK
Used to set/reset the password or
lock/unlock the card. The structure
of the data block is described in
chapter “Card lock/unlock
operation”. The size of the Data
Block is defined by the
SET_BLOCK_LEN command.
CMD43… reserved
CMD57
CMD58
Yes
None
R3
READ_OCR
Reads the OCR register of a card.
CMD59
Yes
[31:0] stuff bits
R1
CRC_ON_OFF
Turns the CRC option on or off. A
[0:0] CRC option
‘1’ in the CRC option bit will turn
the option on, a ‘0’ will turn it off.
CMD60
No
Notes :
1. The default block length is as specified in the CSD.
2. The data transferred must not cross a physical block boundary unless READ_BLK_MISALIGN is set in
the CSD.
3. R1b : R1 response with an optional trailing busy signal.
4. The data transferred must not cross a physical block boundary unless WRITE_BLK_MISALIGN is set in
the CSD.
5. 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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