Fujitsu MHD2021AT, MHC2032AT, MHC2040AT, MHD2032AT manual Commands without data transfer

Interface

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 50 μs 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.

5.4.3 Commands without data transfer

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

∙

∙

∙

∙

∙

∙

∙

∙

∙

∙

∙

∙

∙

∙

∙

RECABLIBRATE

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

SECURITY ERASE PREPARE

SECURITY FREEZE LOCK

FLUSH CACHE

Figure 5.6 shows the protocol for the command execution without data transfer.

5-74 C141-E050-02EN