Hitachi HTS541040G9AT00 Specifications - Page 150

Read Multiple C4h

Page 150 highlights

13.17 Read Multiple (C4h) Table 92: Read Multiple (C4h) 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 1 L 1 D H H H H Command 1 1 0 0 0 1 0 0 76 CRC UNC 0V Error Register 54 3 2 1 0 0 IDN 0 ABT T0N AMN 0V 0 V 0 0 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 Status Register 7 654 3 2 1 0 BSY RDY DF DSC DRQ COR IDX ERR 0 V0V - 0 - V The Read Multiple command reads one or more sectors of data from disk media and then transfers the data from the device to the host. The sectors are transferred through the Data Register 16 bits at a time. The command execution is identical to the Read Sectors command with one exception: an interrupt is generated for each block-as defined by the Set Multiple command-instead of for each sector. Output parameters to the device Sector Count This indicates the number of continuous sectors to be transferred. If zero is specified, 256 sectors will be transferred. LBA Low This indicates 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/Low This indicates 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 This indicates the head number of the first sector to be transferred. (L = 0) In LBA mode, this register contains LBA bits 24-27. (L = 1) Input parameters from the device Sector Count This indicates the number of requested sectors not transferred. This number is zero unless an unrecoverable error occurs. LBA Low This indicates the sector number of the last transferred sector. (L = 0) In LBA mode, this register contains current LBA bits 0-7. (L = 1) Travelstar 5K100 Hard Disk Drive Specification 136

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Travelstar 5K100 Hard Disk Drive Specification
136
13.17
Read Multiple (C4h)
Table 92: Read Multiple (C4h)
The Read Multiple command reads one or more sectors of data from disk media and then transfers the data from
the device to the host.
The sectors are transferred through the Data Register 16 bits at a time. The command execution is identical to the
Read Sectors command with one exception: an interrupt is generated for each block—as defined by the Set Multi-
ple command—instead of for each sector.
Output parameters to the device
Sector Count
This indicates the number of continuous sectors to be transferred. If zero is specified, 256
sectors will be transferred.
LBA Low
This indicates 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/Low
This indicates 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
This indicates the head number of the first sector to be transferred. (L = 0)
In LBA mode, this register contains LBA bits 24–27. (L = 1)
Input parameters from the device
Sector Count
This indicates the number of requested sectors not transferred. This number is zero unless
an unrecoverable error occurs.
LBA Low
This indicates the sector number of the last transferred sector. (L = 0)
In LBA mode, this register contains current LBA bits 0–7. (L = 1)
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
1 L 1 D H H H H
Device
- - - - - H H H H
Command
1 1 0 0 0 1 0 0
Status
see below
Error Register
Status Register
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
CRC UNC 0 IDN 0 ABT T0N AMN
BSY RDY DF DSC DRQ COR IDX ERR
0
V
0
V
0
V
0
0
0
V
0
V
-
0
-
V