HANBit

HFDOM44S3Rxxx

URL:www.hbe.co.kr

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HANBit Electronics Co., Ltd.

Rev. 1.0 (January, 2005)

Feature(1)

X

Write Buffer

The Write Buffer command enables the host to overwrite contents of the CompactFlash Storage Card’s sector

buffer with any data pattern desired. This command has the same protocol as the Write Sector(s) command and

transfers 512 bytes.

Write Long Sector –32h or 33h

Bit->

7

6

5

4

3

2

1

0

Command(7)

32h or 33h

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)

X

Feature(1)

X

Write Long Sector

This command is similar to the Write Sector(s) command except that it writes 516 bytes instead of 512 bytes. Only

single sector Write Long operations are supported. The transfer consists of 512 bytes of data transferred in word

mode followed by 4 bytes of ECC transferred in byte mode. Because of the unique nature of the solid-state

CompactFlash Storage Card, the four bytes of ECC transferred by the host may be used by the CompactFlash

Storage Card. The CompactFlash Storage Card may discard these four bytes and write the sector with valid ECC

data. This command has the same protocol as the Write Sector(s) command. Use of this command is not

recommended.

Write Multiple Command – C5h

Bit->

7

6

5

4

3

2

1

0

Command(7)

C5h

C/D/H(6)

X

LBA

X

Drive

Head

Cyl High(5)

Cylinder High

Cyl Low(4)

Cylinder Low

Sec Num(3)

Sector Number

Sec Cnt(2)

Sector Count

Feature(1)

X

Write Multiple Command

Note: The current revision of the CompactFlash Storage Card only supports a block count of 1 as indicated in the

Identify Drive Command information. This command is provided for compatibility with future products which may

support a larger block count.

This command is similar to the Write Sectors command. The CompactFlash Storage Card sets BSY within 400

nsec of accepting the command. Interrupts are not presented on each sector but on the transfer of a block which

contains the number of sectors defined by Set Multiple.

Command execution is identical to the Write Sectors operation except that the number of sectors defined by the

Set Multiple command is transferred without intervening interrupts.

DRQ qualification of the transfer is required only at the start of the data block, not on each sector. The block count

of sectors to be transferred without intervening interrupts is programmed by the Set Multiple Mode command,

which must be executed prior to the Write Multiple command.

When the Write Multiple command is issued, the Sector Count Register contains the number of sectors (not the