Fujitsu MPG3xxxAT, Product Manual, Page: 145 / 201

C141-E110-02EN 5 - 78
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 reading of a single sector or the last sector in multiple-sector
reading. If the timing to read the Status register does not meet above condition, normal data
transfer operation is not guaranteed.
When the host new command even if the device requests the data transfer (setting in DRQ
bit), the correct device operation is not guaranteed.
* Transfers dummy data
* The host should receive 512-byte dummy data or release the DRQ set state by resetting.
Status read
Command
BSY
INTRQ
DRDY
~
Parameter write
DRQ
Data transfer
Figure 5.3 Protocol for command abort
5.4.2 Data transferring commands from host to device
The execution of the following commands involves Data transfer from the host to the drive.
•
FORMAT TRACK
•
WRITE SECTOR(S)
•
WRITE LONG
•
WRITE BUFFER
•
WRITE VERIFY
•
SECURITY DISABLE PASSWORD
•
SECURITY ERASE UNIT
•
SECURITY SET PASSWORD
•
SECURITY UNLOCK
The execution of these commands includes the transfer one or more sectors of data from the host
to the device. In the WRITE LONG command, 516 bytes are transferred. Following shows the
protocol outline.