SanDisk SDSDB-016G-P36 Product Manual - Page 79
CMD Index, Argument, Resp., Abbreviation, Description, Erase Commands Class 5, I/O Mode Commands
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Revision 2.2 Chapter 4 - SD Card Protocol Description SanDisk SD Card Product Manual CMD Index Type Argument Resp. Abbreviation CMD31 Reserved Erase Commands (Class 5) CMD32 ac [31:0] data address CMD33 ac [31:0] data address R1 ERASE_WR_BLK_START R1 ERASE_WR_BLK_END CMD38 CMD39 CMD40 ac [31:0] don't care R1b ERASE Reserved --- --- --- --- CMD41 Reserved I/O Mode Commands (Class 9) CMD39 CMD40 CMD41 MMCA Optional Command, currently not supported. Reserved Lock Card Commands (Class 7) CMD16 ac [31:] block length R1 SET_BLOCKLEN CMD42 adtc [31:0] stuff bits R1 LOCK_UNLOCK Description (representing 32 writeprotect 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 writeprotection bits shall be set to zero. Sets the address of the first write block to be erased. Sets the address of the last write block of the continuous range to be erased. Erases all previously selected write blocks. Not valid in SD Memory Card -Reserved for MultiMediaCard I/O mode. Sets the block length (in bytes) for all following block commands (read, write, lock). Default block length is specified in the CSD. Supported only if Partial block RD/WR operation are allowed in CSD. Used to set/reset the password or lock/unlock the card. The size of the data block is set by the SET_BLOCK_LEN command. © 2004 SanDisk Corporation 4-35 12/08/04