4.2Supported 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).

4.2.1MMC 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.

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

 

 

 

4.2.2Reduced 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.org.

Table 10: Supported commands

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

 

 

 

26

Lyrion CE-ATA Product Manual, Rev. A

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Seagate Lyrion Series Supported command set and features, MMC command set, Reduced ATA command set Supported commands

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