Fujitsu MHA2021AT Data transferring commands from host to device, Protocol for command abort

5.4 Command Protocol

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.

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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.

C141-E042-01EN 5-71