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7K200 SATA OEM Specification
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14.14 Read DMA Ext (25h)
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
Low
- - - - -
-
-
- Data
Low
-
- - - - -
-
-
Data
High
- - - - -
-
-
- Data
High
-
- - - - -
-
-
Current
- - - - -
-
-
- Error
...See
Below...
Feature
Previous - - - - -
-
-
-
Current
V V V V V V V V
HOB=0
-
- - - - -
-
-
Sector Count
Previous V V V V V V V V
Sector Count
HOB=1
-
- - - - -
-
-
Current
V V V V V V V V
HOB=0 V V V V V V V V
LBA Low
Previous V V V V V V V V
LBA Low
HOB=1 V V V V V V V V
Current
V V V V V V V V
HOB=0 V V V V V V V V
LBA Mid
Previous V V V V V V V V
LBA Mid
HOB=1 V V V V V V V V
Current
V V V V V V V V
HOB=0 V V V V V V V V
LBA High
Previous V V V V V V V V
LBA High
HOB=1 V V V V V V V V
Device
- 1 - - -
-
-
- Device
-
- - - - -
-
-
Command
0 0 1 0 0
1
0
1 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
V V 0 V 0 V 0 0 0 V 0 V - 0 0 V
Table 69 Read DMA Ext Command (25h)
The Read DMA Ext 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
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.
If an uncorrectable error occurs, the read will be terminated at the failing sector.
Output Parameters To The Device
Sector Count Current
Sector Count Current
The number of sectors to be transferred low order, bits (7:0).
Sector Count Previous
The number of sectors to be transferred high order, bits (15:8). If 0000h in the Sector
Count register is specified, then 65,536 sectors will be transferred.
Count register is specified, then 65,536 sectors will be transferred.
LBA Low Current
LBA (7:0)
LBA Low Previous
LBA (31:24)
LBA Mid Current
LBA (15:8)
LBA Mid Previous
LBA (39:32)
LBA High Current
LBA (23:16)
LBA High Previous
LBA (47:40)
Input Parameters From The Device
LBA Low (HOB=0)
LBA Low (HOB=0)
LBA (7:0) of the address of the first unrecoverable error.
LBA Low (HOB=1)
LBA (31:24)of the address of the first unrecoverable error.
LBA Mid (HOB=0)
LBA (15:8)of the address of the first unrecoverable error.
LBA Mid (HOB=1)
LBA (39:32)of the address of the first unrecoverable error.
LBA High (HOB=0)
LBA (23:16)of the address of the first unrecoverable error.
LBA High (HOB=1)
LBA (47:40)of the address of the first unrecoverable error.