HANBit

HFDOM40KRxxx

URL:www.hbe.co.kr

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HANBit Electronics Co., Ltd.

Rev. 1.2 (Decemver. 2003)

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)

30h or 31h

C/D/H(6)

1

LBA

1

Drive

Head(LBA 27 – 24)

Cyl High(5)

Cylinder High (LBA 23 – 16)

Cyl Low(4)

Cylinder Low (15 – 8)

Sec Num(3)

Sector Number (LBA 7 – 0)

Sec Cnt(2)

Sector Count

Feature(1)

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)

38h

C/D/H(6)

1

LBA

1

Drive

Head(LBA 27 – 24)

Cyl High(5)

Cylinder High (LBA 23 – 16)

Cyl Low(4)

LBA(15 – 8)

Sec Num(3)

Sector Number (LBA 7 – 0)

Sec Cnt(2)

Sector Count

Feature(1)

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