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MC12U512NAYC-0QC00 Folha de dados(PDF) 54 Page - Samsung semiconductor |
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MC12U512NAYC-0QC00 Folha de dados(HTML) 54 Page - Samsung semiconductor |
54 / 66 page MultiMediaCard TM 54 The following table provides a detailed description of the SPI bus commands. The responses are defined in Chapter “Responses”. The Table “Commands and Arguments” lists all MultiMediaCard commands. A “yes” in the SPI mode colon indicates that the command is supported in SPI mode. With these restrictions, the command class description in the CSD is still valid. If a command does not require an argument, the value of this field should be set to zero. The reserved commands are reserved in MultiMediaCard mode as well. The binary code of a command is defined by the mnemonic symbol. As an example, the content of the command index field is (binary) ‘000000’ for CMD0 and ‘100111’ for CMD39. Table 4-15 Commands and Arguments CMD index SPI mode Argument Resp Abbreviation Command description CMD0 Yes None R1 GO_IDLE_STATE resets the MultiMediaCard CMD1 Yes None R1 SEND_OP_COND Activates the card’s initialization process. CMD2 No CMD3 No CMD4 No CMD5 reversed CMD6 reversed CMD7 No CMD8 reversed CMD9 Yes None R1 SEND_CSD asks the selected card to send its card-specific data (CSD) CMD10 Yes None R1 SEND_CID asks the selected card to send its card identification (CID) CMD11 No CMD12 No CMD13 Yes None R2 SEND_STATUS asks the selected card to send its status register. CMD14 reversed CMD15 No CMD16 Yes [31:0] block length R1 SET_BLOCKLEN selects a block length (in bytes) for all following block commands (read and write). *1 CMD17 Yes [31:0] data address R1 READ_SINGLE_ BLOCK reads a block of the size selected by the SET_BLOCKLEN command. *2 CMD18 Yes [31:0] data address R1 READ_MULTIPLE _BLOCK continuously transfers data blocks from card to host until interrupted by a stop command or the requested number of data blocks transmitted. CMD19 reversed CMD20 No CMD21… CMD22 reversed CMD23 Yes [31:16] set to 0 [15:0] number of blocks R1 SET_BLOCK_CO UNT Defines the number of blocks which are going to be transferred in the immediately exceeding multiple block read or write command. CMD24 Yes [31:0] data address R1b *3 WRITE_BLOCK writes a block of the size selected by the SET_BLOCKLEN |
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