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5.4 Command Protocol
C141-E042-01EN 5-71
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.
Figure 5.4 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.
•
WRITE SECTOR(S)
•
WRITE LONG
•
WRITE BUFFER
•
WRITE VERIFY
•
SECURITY DISABLE PASSWORD
•
SECURITY ERASE UNIT
•
SECURITY SET PASSWORD
•
SECURITY UNCLOK
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.
a) The host writes any required parameters to the Features, Sector Count, Sector
Number, Cylinder, and Device/Head registers.