Read Dma(C8H/C9H); Figure 65 Read Dma Command (C8H/C9H) - Hitachi HTS541616J9AT00 - Travelstar 160 GB Hard Drive Specifications
2.5 inch ata/ide hard disk drive
Hide thumbs
Also See for HTS541616J9AT00 - Travelstar 160 GB Hard Drive:
- Install manual (2 pages) ,
- Datasheet (2 pages)
Table of Contents
Advertisement
14.13 Read DMA(C8h/C9h)
Command Block Output Registers
Register
Data
Feature
Sector Count
LBA Low
LBA Mid
LBA High
Device
Command
Error Register
7
6
5
4
CRC UNC
0
IDN
V
V
0
V
Figure 65 Read DMA Command (C8h/C9h)
The Read DMA 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.
The host initializes a slave-DMA channel prior to issuing the command. The 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 read will be terminated at the failing sector.
Output Parameters To The Device
Sector Count
LBA Low
LBA High/Mid
H
R
Input Parameters From The Device
Sector Count
LBA Low
LBA High/Mid
H
Travelstar 5K160 (PATA) Hard Disk Drive Specification
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
V V V V V V V V
V V V V V V V V
V V V V V V V V
V V V V V V V V
- L - D H H H H
1 1 0 0 1 0 0 R
3
2
1
0
0
ABT T0N
AM
N
0
V
0
0
The number of continuous sectors to be transferred. If zero is specified, then 256 sectors
will be transferred.
The sector number of the first sector to be transferred. (L=0)
In LBA mode, this register specifies LBA address bits 0 - 7 to be transferred. (L=1)
The cylinder number of the first sector to be transferred. (L=0)
In LBA mode, this register specifies LBA address bits 8 - 15 (Mid) 16 - 23 (High) to be
transferred. (L=1)
The head number of the first sector to be transferred. (L=0)
In LBA mode, this register specifies LBA bits 24-27 to be transferred. (L=1)
The retry bit, but this bit is ignored.
The number of requested sectors not transferred. This will be zero, unless an
unrecoverable error occurs.
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 sector to be transferred. (L=0)
In LBA mode, this register contains current LBA bits 24 - 27. (L=1)
117 / 188
Command Block Input Registers
Register
Data
Error
Sector Count
LBA Low
LBA Mid
LBA High
Device
Status
Status Register
7
6
5
4
BSY RDY
DF
DSC DRQ COR IDX ERR
0
V
0
V
7 6 5 4 3 2 1 0
- - - - - - - -
...See Below...
V V V V V V V V
V V V V V V V V
V V V V V V V V
V V V V V V V V
- - - - H H H H
...See Below...
3
2
1
0
-
0
-
V
Hide quick links:
Advertisement
Table of Contents
