11.16 Read Multiple (C4h)
see below
Status
1 1 0 0 0 1 0 0
Command
- - - - H H H H
Device/Head
1 L 1 D H H H H
Device/Head
V V V V V V V V
Cylinder High
V V V V V V V V
Cylinder High
V V V V V V V V
Cylinder Low
V V V V V V V V
Cylinder Low
V V V V V V V V
Sector Number
V V V V V V V V
Sector Number
V V V V V V V V
Sector Count
V V V V V V V V
Sector Count
see below
Error
- - - - - - - -
Feature
- - - - - - - -
Data
- - - - - - - -
Data
7 6 5 4 3 2 1 0
Register
7 6 5 4 3 2 1 0
Register
Command Block Input
Registers
Command Block Output
Registers
V
–
0
–
V
0
V
0
V
0
V
0
V
0
V
0
ERR
IDX
COR
DRQ
DSC
DF
RDY
BSY
AMN
T0N
ABT
0
IDN
0
UNC
CRC
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Status Register
Error Register
Figure 114. Read Multiple Command (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. 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, 256
sectors will be transferred.
Sector Number
The sector number of the first sector to be transferred. (L=0)
In LBA mode this register contains LBA bits 0 - 7. (L=1)
Cylinder High/Low
The cylinder number of the first sector to be transferred. (L=0)
In LBA mode this register contains LBA bits 8 - 15 (Low), 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.
Deskstar 120GXP hard disk drive specifications
134
Содержание IC35L040AVVN07-0 - 40GB IDE Deskstar 120GXP 7200RPM UATA-100...
Страница 2: ...This page intentionally left blank...
Страница 10: ...This page intentionally left blank...
Страница 16: ...This page intentionally left blank...
Страница 18: ...This page intentionally left blank...
Страница 19: ...Part 1 Functional specification Deskstar 120GXP hard disk drive specifications 5...
Страница 20: ...This page intentionally left blank...
Страница 22: ...This page intentionally left blank...
Страница 34: ...This page intentionally left blank...
Страница 76: ...This page intentionally left blank...
Страница 77: ...Part 2 Interface specification Deskstar 120GXP hard disk drive specifications 63...
Страница 78: ...This page intentionally left blank...
Страница 80: ...This page intentionally left blank...
Страница 206: ...This page intentionally left blank...
Страница 208: ...This page intentionally left blank...