Fujitsu MHY2040BH, Product/Maintenance Manual

Page: 257 / 322

5.4 Command Protocol
C141-E262 5-179
5.4.3 PIO data-out command protocol
Execution of the following commands involves data transfers from the host
system to the device:
• WRITE SECTOR (S) (EXT)
•
WRITE MULTI (EXT) (FUA EXT)
•
WRITE BUFFER
• WRITE VERIFY
•
SMART WRITE LOG SECTOR
•
SECURITY DISABLE PASSWORD
•
SECURITY ERASE UNIT
•
SECURITY SET PASSWORD
• SECURITY UNLOCK
•
SET MAX SET PASSWORD
•
SET MAX UNLOCK
•
DOWNLOAD MICROCODE
•
WRITE LOG EXT
•
DEVICE CONFIGRATION SET
Data of one or more sectors is transferred from the host to the device.
An outline of this protocol is as follows:
1) The device receives a PIO data-out command with the RegHD FIS.
2) If an error remaining in the device prevents command execution, the device
sends the RegDH FIS with 1 set in the I bit.
3) When the device is ready to receive data, it sets 0 in the BSY bit and 1 in the
DRQ bit of the Status field of the PIO Setup FIS. At this time, the device sets
0 in the I bit of the Status field of the PIO Setup FIS for a data transfer to the
first sector, while it sets 1 in the I bit for a data transfer to any sector other
than the first sector. Then, it sends this FIS to the host. In the E_Status field,
the device sets 1 in the BSY bit and 0 in the DRQ bit.