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26 Lyrion CE-ATA Product Manual, Rev. A
4.2 Supported command set and features
This section describes the MMC level commands supported by the drive followed the supported reduced ATA
command set and a description of the supported Status and Control Registers (SCR).
4.2.1 MMC command set
The following table lists the supported and essential MMC command set for initializing, status checking, error
handling, and transferring data. For a detailed description of these commands, refer to the MMC System Spec-
ification v 4.0 available to MMCA members under NDA.
4.2.2 Reduced ATA command set
The following table lists CE-ATA defined reduced ATA command set. For a detailed description of these com-
mands, refer to the CE-ATA specification revision 1.1 at www.ce-ata.or
g.
Table 10: Supported commands
Table 9: MMC command set
Command
Index Command Name Command Description
CMD0 GO_IDLE_STATE Hard resets the drive to MMC idle state
CMD1 SEND_OP_COND Requests OCR contents in response from the drive
CMD2 ALL_SEND_CID Requests CID in response from the drive
CMD3 SET_RELATIVE_ADDR Assign relative address to the drive
CMD6 SWITCH Switch mode of operation, modify the EXT_CSD register
CMD7 SELECT/DESELECT CARD
Toggles the MMC standby and MMC transfer states or the MMC
programming and MMC disconnected states
CMD8 SEND_EXT_CSD Request the drive to send its EXT_CSD register as a block of data
CMD9 SEND_CSD Requests CSD in response from the drive
CMD10 SEND_CID Requests CID in response from the drive
CMD12 STOP_TRANSMISSION Forces the drive to stop MMC transmission
CMD13 SEND_STATUS Requests the drive to send its MMC status in the response
CMD16 SET_BLOCKLEN Sets the MMC transfer block length for data transfers.
CMD39 FAST_IO Write or Read 8 bit register data.
CMD60 RW_MULTIPLE_REGISTER Read or Write ATA register data and SCR register data.
CMD61 RW_MULTIPLE_BLOCK Transfer data for the ATA command requested by CMD60
Command opcode Command name Command description
25h Read DMA EXT Reads data from the drive in logical blocks
35h Write DMA EXT Writes data to the drive in logical blocks
E0h Standby Immediate Spins down the drive to enter its standby state
EAh Flush Cache EXT Flushes buffered data from the drive's cache to the media
ECh Identify Device Transfers information about the drive to the host