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Error handling is similar to the Write Multiple command, except that the error sector address is always returned
as a 48 bit address, and the sector count is a 16 bit number.
Table 69: Write Multiple Ext
register write
previous
current
Task File Register
15:8
7
6
5
4
3
2
1
0
COMMAND
-
39h
DRIVE/HEAD
-
1
1
1
Drive
Reserved
LBA High
LBA Mid
LBA Low
SECTOR COUNT
FEATURES
LBA (47:40)
LBA (39:32)
LBA (31:24)
15:8
nu
LBA (23:16)
LBA (15:8)
LBA (7:0)
7:0
nu
6.47 Write Sector(s) (30h)
This command writes from 1 to 256 sectors as specified in the Sector Count Register. A sector count of zero
requests 256 sectors. The transfer begins at the sector specified in the Sector Number Register. When this
command is accepted, the Drive sets BSY, sets DRQ and clears BSY, then waits for the host to fill the sector buffer
with the data to be written. No interrupt is generated to start the first host transfer operation. No data should
be transferred by the host until BSY has been cleared by the host.
For multiple sectors, after the first sector of data is in the buffer, BSY will be set and DRQ will be cleared. After
the next buffer is ready for data, BSY is cleared, DRQ is set and an interrupt is generated. When the final sector
of data is transferred, BSY is set and DRQ is cleared. It will remain in this state until the command is completed
at which time BSY is cleared and an interrupt is generated. If an error occurs during a write of more than one
sector, writing terminates at the sector where the error occurred. The Command Block Registers contain the
cylinder, head and sector number of the sector where the error occurred. The host may then read the command
block to determine what error has occurred, and on which sector. Table 70 defines the Write Sector(s) command
Byte sequence.
Table 70: Write Sector(s)
Task File Register
7
6
5
4
3
2
1
0
COMMAND
30h
DRIVE/HEAD
1
LBA
1
D
Head (LBA 27:24)
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
Cylinder High (LBA23:16)
Cylinder Low (LBA15:8)
Sector number (LBA7:0)
Sector Count
nu
6.48 Write Sector(s) Ext (34h) 48bit LBA
This is the 48-bit address version of the Write Sector(s) command.
This command writes from 1 to 65,536 sectors as specified in the Sector Count Register. A sector count value of
0000h requests 65,536 sectors. The device shall interrupt for each DRQ block transferred.
If an error occurs during a write of more than one sector, writing terminates at the sector where the error
occurs. The Command Block Registers contain the 48-bit LBA of the sector where the error occurred. The host
may then read the command block to determine what error has occurred, and on which sector.
Table 71: Write Sector(s) Ext
register write
previous
current
Task File Register
15:8
7
6
5
4
3
2
1
0
COMMAND
-
34h
DRIVE/HEAD
-
1
1
1
Drive
Reserved
LBA High
LBA Mid
LBA Low
SECTOR COUNT
FEATURES
LBA (47:40)
LBA (39:32)
LBA (31:24)
15:8
nu
LBA (23:16)
LBA (15:8)
LBA (7:0)
7:0
nu
Swissbit AG
Industriestrasse 4
Swissbit reserves the right to change products or specifications without notice.
Revision: 0.92
CH-9552 Bronschhofen
Switzerland
www.swissbit.com
industrial@swissbit.com
F-240_data_sheet_CA-HxBV_Rev092.doc
Page 42 of 56
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