Commands Without Data Transfer; Figure 5.5 Write Sector(S) Command Protocol - Fujitsu MHR2010AT Product Manual

Interface

Figure 5.5 WRITE SECTOR(S) command protocol

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.
RECABLIBRATE
5-110
IMPORTANT
C141-E145-02EN