HANBit

HFDOM40MRxxx

URL:www.hbe.co.kr

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HANBit Electronics Co., Ltd.

Rev. 1.0 (November. 2003)

Bit 1 This bit is 0.

Bit 0 (AMNF) This bit is set in case of a general error.

Device/Head Register

The Drive/Head register is used to select the drive and head. It is also used to select LBA addressing

instead of cylinder/head/sector addressing. The bits are defined as follows:

D7

D6

D5

D4

D3

D2

D1

D0

1

LBA

1

DRV

HS3

HS2

HS1

HS0

Bit 7: This bit is set to 1.

Bit 6: LBA is a flag to select either Cylinder/Head/Sector (CHS) or Logical Block Address Mode (LBA).

When LBA=0, Cylinder/Head/Sector mode is selected. When LBA=1, Logical Block Address is

selected. In Logical Block Mode, the Logical Block Address is interpreted as follows:

LBA7-LBA0: Sector Number Register D7-D0.

LBA15-LBA8: Cylinder Low Register D7-D0.

LBA23-LBA16: Cylinder High Register D7-D0.

LBA27-LBA24: Drive/Head Register bits HS3-HS0.

Bit 5: This bit is set to 1.

Bit 4 (DRV): DRV is the drive number. When DRV=0, drive (card) 0 is selected. When DRV=1, drive (card)

1 is selected. The CompactFlash Storage Card is set to be Card 0 or 1 using the copy field

(Drive #) of the PCMCIA Socket & Copy configuration register.

Bit 3 (HS3): When operating in the Cylinder , Head, Sector mode, this is bit 3 of the head number. It is Bit

27 in the Logical Block Address mode.

Bit 2 (HS2): When operating in the Cylinder, Head, Sector mode, this is bit 2 of the head number. It is Bit

26 in the Logical Block Address mode.

Bit 1 (HS1): When operating in the Cylinder, Head, Sector mode, this is bit 1 of the head number. It is Bit

25 in the Logical Block Address mode.

Bit 0 (HS0): When operating in the Cylinder, Head, Sector mode, this is bit 0 of the head number. It is Bit

24 in the Logical Block Address mode.

Status & Alternate Status Register

These registers return the CompactFlash Storage Card status when read by the host. Reading the Status

register does clear a pending interrupt while reading the Auxiliary Status register does not. The status bits

are described as follows:

D7

D6

D5

D4

D3

D2

D1

D0

BUSY

RDY

DWF

DSC

DRQ

CORR

0

ERR

Bit 7 (BUSY): The busy bit is set when the CompactFlash Storage Card has access to the command buffer