Commands Without Data Transfer; Protocol For The Command Execution Without Data Transfer - Fujitsu MPG3xxxAT Product Manual

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 starting 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.
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.
BSY
DRDY
INTRQ
Figure 5.5
5 - 80
Command
Parameter write
~

Protocol for the command execution without data transfer

C141-E110-02EN
Status read