5K320 SATA OEM Specification

14.22Read Sector(s) (20h/21h)

Command Block Output Registers

Register

7

 

6

 

5

 

4

 

3

2

 

1

 

0

 

Data

-

 

-

 

-

 

-

 

-

-

 

-

 

-

 

Feature

-

 

-

 

-

 

-

 

-

-

 

-

 

-

 

Sector Count

V

 

V

 

V

 

V

 

V

V

 

V

 

V

 

LBA Low

V

V

 

V

V

V

V

V

V

 

LBA Mid

V

 

V

 

V

 

V

 

V

V

 

V

 

V

 

LBA High

V

 

V

 

V

 

V

 

V

V

 

V

 

V

 

Device

-

 

L

 

-

 

-

 

H

H

 

H

 

H

 

Command

0

 

0

 

1

 

0

 

0

0

 

0

 

R

 

Command Block Input Registers

Register

7

 

6

 

 

5

 

4

 

3

 

2

 

1

0

Data

-

 

 

-

 

 

 

-

 

 

-

 

 

-

 

-

 

-

-

Error

 

 

 

 

 

...See Below...

 

 

Sector Count

V

V

V

V

V

V

 

V

V

LBA Low

V

 

 

V

 

 

V

 

 

V

 

 

V

 

V

 

V

V

LBA Mid

V

 

 

V

 

 

V

 

 

V

 

 

V

 

V

 

V

V

LBA High

V

 

 

V

 

 

V

 

 

V

 

 

V

 

V

 

V

V

Device

-

 

 

-

 

 

 

-

 

 

-

 

 

H

 

H

 

H

H

Status

 

 

 

 

 

...See Below...

 

 

Error Register

7

6

5

4

3

2

1

0

 

CRC

UNC

0

IDN

0

ABT

T0N

AM

 

 

 

 

 

 

 

 

N

 

0

V

0

V

0

V

0

0

 

Status Register

7

6

5

4

3

2

1

0

BSY

RDY

DF

DSC

DRQ

COR

IDX

ERR

 

 

 

 

 

 

 

 

0

V

0

V

-

0

0

V

Table 88 Read Sector(s) Command (20h/21h)

The Read Sector(s) command reads one or more sectors of data from disk media, then transfers the data from the device to the host.

The sectors are transferred through the Data Register 16 bits at a time.

If an uncorrectable error occurs, the read will be terminated at the failing sector.

Output Parameters To The Device

Sector Count

The number of continuous sectors to be transferred. If zero is specified, then 256 sectors

 

will be transferred.

LBA Low

The sector number of the first sector to be transferred. (L=0)

 

In LBA mode, this register contains LBA bits 0 - 7. (L=1)

LBA High/Mid

The cylinder number of the first sector to be transferred. (L=0)

 

In LBA mode, this register contains LBA bits 8 - 15 (Mid), 16 - 23 (High). (L=1)

H

The head number of the first sector to be transferred. (L=0)

 

In LBA mode, this register contains LBA bits 24 - 27. (L=1)

R

The retry bit, but this bit is ignored.

Input Parameters From The Device

Sector Count

The number of requested sectors not transferred. This will be zero, unless an

 

unrecoverable error occurs.

LBA Low

The sector number of the last transferred sector. (L=0)

 

In LBA mode, this register contains current LBA bits 0 - 7. (L=1)

LBA High/Mid

The cylinder number of the last transferred sector. (L=0)

 

In LBA mode, this register contains current LBA bits 8 - 15 (Mid), 16 - 23 (High).

 

(L=1)

H

The head number of the last transferred sector. (L=0)

 

In LBA mode, this register contains current LBA bits 24 - 27. ( L=1)

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Hitachi HTS543280L9A300, HTS543212L9SA00 manual Read Sectors 20h/21h, Read Sectors Command 20h/21h