HANBit

HFDOM40K3R

URL:www.hbe.co.kr

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HANBit Electronics Co., Ltd.

Rev. 2.0 (October. 2004)

Cyl High(5)

X

Cyl Low(4)

X

Sec Num(3)

X

Sec Cnt(2)

Number of Sectors

Feature(1)

X

Initialize Drive Parameters

This command enables the host to set the number of sectors per track and the number of heads per cylinder. Only

the Sector Count and the Card/Drive/Head registers are used by this command.

Read Buffer – E4h

Bit->

7

6

5

4

3

2

1

0

Command(7)

E4h

C/D/H(6)

X

Drive

X

Cyl High(5)

X

Cyl Low(4)

X

Sec Num(3)

X

Sec Cnt(2)

X

Feature(1)

X

Read Buffer

The Read Buffer command enables the host to read the current contents of the CompactFlash

Storage Card’s sector buffer. This command has the same protocol as the Read Sector(s) command.

Read Multiple – C4h

Bit->

7

6

5

4

3

2

1

0

Command(7)

C4h

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

Read Multiple

The Read Multiple command performs similarly to the Read Sectors command. Interrupts are not generated on

every sector, but on the transfer of a block which contains the number of sectors defined by a Set Multiple

command.

Command execution is identical to the Read Sectors operation except that the number of sectors defined by a Set

Multiple command are 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 Read Multiple command.

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

number of blocks or the block count) requested. If the number of requested

sectors is not evenly divisible by the block count, as many full blocks as possible are transferred, followed by a final,