FUJITSU MHK2090AT - Manual (Page 153)

Interface
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words, the host should receive the relevant sector of data (512 bytes of uninsured
dummy data) or release the DRQ status by resetting.
Figure 5.3 shows an example of READ SECTOR(S) command protocol, and
Figure 5.4 shows an example protocol for command abort.
Figure 5.3 Read 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