Hitachi HTS541680J9SA00 Specifications - Page 106

Read Multiple C4h

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Travelstar 5K160 (SATA) Hard Disk Drive Specification 14.18 Read Multiple (C4h) Command Block Output Registers Register 76543210 Data -------- Feature -------- Sector Count VVVVVVVV LBA Low VVVVVVVV LBA Mid VVVVVVVV LBA High VVVVVVVV Device - L - - HHHH Command 11000100 Command Block Input Registers Register 76543210 Data -------- Error ...See Below... Sector Count VVVVVVVV LBA Low VVVVVVVV LBA Mid VVVVVVVV LBA High VVVVVVVV Device - - - - HHHH Status ...See Below... Error Register 7 6 5 4 3 2 1 0 CRC UNC 0 IDN 0 ABT T0N AM N 0V0V0V0 0 Figure 62 Read Multiple Command (C4h) Status Register 7 6543 2 10 BSY RDY DF DSC DRQ COR IDX ERR 0V0V - 0 0V The Read Multiple 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. Command execution is identical to the Read Sectors command except that 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 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) 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) LBA mode, this register contains current LBA bits 24 - 27. (L=1) 106/167

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Travelstar 5K160 (SATA) Hard Disk Drive Specification
106/167
14.18
Read Multiple (C4h)
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
-
-
HHHH
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
AM
N
BSY
RDY
DF
DSC
DRQ COR
IDX
ERR
0
V
0
V
0
V
0
0
0
V
0
V
-
0
0
V
Figure 62 Read Multiple Command (C4h)
The Read Multiple 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. Command execution is
identical to the Read Sectors command except that 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
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)
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)
LBA mode, this register contains current LBA bits 24 - 27. (L=1)