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5-16 C141-E050-02EN
Y*: Necessary to set parameters under the LBA mode.
N: Not necessary to set parameters (The parameter is ignored if it is set.)
N*: May set parameters
D: The device parameter is valid, and the head parameter is ignored.
D*: The command is addressed to the master device, but both the master device
and the slave device execute it.
X: Do not care
5.3.2 Command descriptions
The contents of the I/O registers to be necessary for issuing a command and the
example indication of the I/O registers at command conpletion are shown as
following in this subsection.
Example: READ SECTOR(S) WITH RETRY
At command issuance (I/O registers setting contents)
Bit 7 6 5 4 3 2 1 0
1F7
H
(CM)
0 0 1 0 0 0 0 0
1F6
H
(DH)
×
L
×
DV
Head No. / LBA [MSB]
1F5
H
(CH)
Start cylinder address [MSB] / LBA
1F4
H
(CL)
Start cylinder address [LSB] / LBA
1F3
H
(SN)
Start sector No. / LBA [LSB]
1F2
H
(SC)
Transfer sector count
1F1
H
(FR)
xx
At command completion (I/O registers contents to be read)
Bit 7 6 5 4 3 2 1 0
1F7
H
(ST)
Status information
1F6
H
(DH)
×
L
×
DV
Head No. / LBA [MSB]
1F5
H
(CH)
End cylinder address [MSB] / LBA
1F4
H
(CL)
End cylinder address [LSB] / LBA
1F3
H
(SN)
End sector No. / LBA [LSB]
1F2
H
(SC)
X’00’
1F1
H
(ER)
Error information