Hitachi HTS543212L9SA00 manual Write DMA CAh/CBh, Output Parameters To The Device Sector Count

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

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

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)

The head number of the last transferred sector. (L=0) In LBA mode, this register contains current LBA bits 24 - 27. (L=1)

163

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

5K320 SATA OEM Specification

14.44Write DMA (CAh/CBh)

Command Block Output Registers

Command Block Input Registers

Register

7

6

5

4

3

2

1

0

Register

7

6

5

4

3

2

1

0

Data

-

-

-

-

-

-

-

-

Data

-

-

-

-

-

-

-

-

Feature

-

-

-

-

-

-

-

-

Error

...See Below...

Sector Count

V

V

V

V

V

V

V

V

Sector Count

V

V

V

V

V

V

V

V

LBA Low

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 Mid

V

V

V

V

V

V

V

V

LBA High

V

V

V

V

V

V

V

V

LBA High

V

V

V

V

V

V

V

V

Device

-

L

-

-

H

H

H

H

Device

-

-

-

-

H

H

H

H

Command

1

1

0

0

1

0

1

R

Status

...See Below...

Error Register

7	6	5	4	3	2	1	0
CRC	UNC	0	IDN	0	ABT	T0N	AM
							N
V	0	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 V V - 0 0 V

Table 128 Write DMA Command (CAh/CBh)

The Write DMA command transfers one or more sectors of data from the host to the device, then the data is written to the disk media.

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

The host initializes a slave-DMA channel prior to issuing the command. Data transfers are qualified by DMARQ and are performed by the slave-DMA channel. The device issues only one interrupt per command to indicate that data transfer has terminated and status is available. If an uncorrectable error occurs, the write 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

LBA Low

LBA High/Mid

H