Fujitsu MPB3043AT Manual Do Utilizador

C141-E045-02EN

5 - 16

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) 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)

Error information

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)

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

SC:  Sector Count register

x, xx:  Do not care (no necessary to set)