Note:

For transfer of a sector of data, the host needs to read Status register (X'1F7') in order to clear INTRQ (interrupt) signal. The Status register should be read within a period from the DRQ setting by the device to 5 ∝ s after the completion of the sector data transfer. Note that the host does not need to read the Status register for the first and the last sector to be transferred. If the timing to read the Status register does not meet above condition, normal data transfer operation is not assured guaranteed.

When the host issues the command even if the drive requests the data transfer (DRQ bit is set), or when the host executes resetting, the device correct operation is not guaranteed.

5.4.3Commands without data transfer

Execution of the following commands does not involve data transfer between the host and the device.

RECALIBRATE

SEEK

READY VERIFY SECTOR(S)

EXECUTE DEVICE DIAGNOSTIC

INITIALIZE DEVICE PARAMETERS

SET FEATURES

SET MULTIPLE MODE

IDLE

IDLE IMMEDIATE

STANDBY

STANDBY IMMEDIATE

CHECK POWER MODE

FLUSH CACHE

SECURITY ERASE PREPARE

SECURITY FREEZE LOCK

SMART: except for SMART Read Attribute values and SMART Read Attribute Thresholds

SET MAX ADDRESS

READ NATIVE MAX ADDRESS

Figure 5.5 shows the protocol for the command execution without data transfer.

Parameter write

Command

Status read

~

 

BSY

DRDY

INTRQ

Figure 5.5 Protocol for the command execution without data transfer

C141-E116-01EN

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Fujitsu MPG3XXXAH-E manual Commands without data transfer, SET MAX Address Read Native MAX Address, BSY Drdy Intrq