12.37 Write DMA Queued (CCh)
see below
Status
1 1 0 0 1 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
V V V V V V V V
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
0
V
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 143. Write DMA Queued Command (CCh)
This command executes in a similar manner to a WRITE DMA command. The device may perform a bus
release or it may execute the data transfer without performing a bus release if the data is ready to trans-
fer.
If the device performs a bus release, the host shall reselect the device using the SERVICE command.
Once the data transfer has begun, the device does not perform a bus release until the entire data transfer
has been completed.
Output parameters to the device
Feature
number of sectors to be transferred. A value of 00h indicates that 256 sectors
are to be transferred.
Sector Count
bits 7 - 3 (Tag) contain the Tag for the command being delivered.
Sector Number
starting sector number or LBA address bits 7 - 0.
Cylinder High/Low starting cylinder number or LBA address bits 23 - 8.
H
starting head number or LBA address bits 27 - 24.
Deskstar 40GV & 75GXP hard disk drive specifications
185
Содержание DTLA-305040 - Deskstar 41.1 GB Hard Drive
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