Interface
5-18 C141-E202-01EN
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 completion are shown as
following in this subsection.
Example: READ SECTOR(S)
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)
x
L
x
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)
x
L
x
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
CM: Command register
FR: Features register
DH: Device/Head register
ST: Status register
CH: Cylinder High register
ER: Error register
CL: Cylinder Low register
L: LBA (logical block address) setting bit
SN: Sector Number register
DV: Device address. bit
Summary of Contents for MHU2100AT
Page 1: ...C141 E202 01EN MHU2100AT DISK DRIVE PRODUCT MANUAL ...
Page 4: ...This page is intentionally left blank ...
Page 8: ...This page is intentionally left blank ...
Page 10: ...This page is intentionally left blank ...
Page 12: ...This page is intentionally left blank ...
Page 24: ...This page is intentionally left blank ...
Page 38: ...This page is intentionally left blank ...
Page 238: ...This page is intentionally left blank ...
Page 260: ...This page is intentionally left blank ...
Page 264: ...This page is intentionally left blank ...
Page 266: ...This page is intentionally left blank ...
Page 272: ...This page is intentionally left blank ...
Page 274: ...This page is intentionally left blank ...
Page 276: ...This page is intentionally left blank ...
Page 277: ......
Page 278: ......