HANBit
HFDOM40KVxxx
operation is not performed. The sectors should be pre-erased with the Erase Sector(s) command before this
command is issued.
Write Sector(s) – 30h or 31h
Bit->
7
6
5
4
3
2
1
0
Command(7)
C/D/H(6)
30h or 31h
Drive
1
LBA
1
Head(LBA 27 – 24)
Cyl High(5)
Cyl Low(4)
Sec Num(3)
Sec Cnt(2)
Feature(1)
Cylinder High (LBA 23 – 16)
Cylinder Low (15 – 8)
Sector Number (LBA 7 – 0)
Sector Count
X
Write Sector(s)
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 CompactFlash Storage Card sets BSY,then 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 occurs.
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 determinem what error has occurred, and on which sector.
Write Sector(s) without Erase – 38h
Bit->
7
6
5
4
3
2
1
0
Command(7)
C/D/H(6)
38h
1
LBA
1
Drive
Head(LBA 27 – 24)
Cyl High(5)
Cyl Low(4)
Sec Num(3)
Sec Cnt(2)
Feature(1)
Cylinder High (LBA 23 – 16)
LBA(15 – 8)
Sector Number (LBA 7 – 0)
Sector Count
X
Write Sector(s) without Erase
This command is similar to the Write Sector(s) command with the exception that an implied erase before write
operation is not performed. This command has the same protocol as the Write Sector(s) command. The sectors
should be pre-erased with the Erase Sector(s) command before this command is issued. If the sector is not pre-
erased with the Erase Sector(s) command, a normal write sector operation will occur.
Write Verify – 3Ch
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HANBit Electronics Co., Ltd.
Rev. 1.1 (December, 2003)
HANBIT [ HANBIT ELECTRONICS CO.,LTD ]
