HANBit

HFDOM40KRxxx

URL:www.hbe.co.kr

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HANBit Electronics Co., Ltd.

Rev. 1.2 (Decemver. 2003)

55h

Disable Read Look Ahead

66h

Disable Power on Reset(POR) establishment of defaults at Soft Reset

69h

NOP – Accepted for backward compatibility

81h

Disable 8 – bit data transfer

8Ah

Disable Power Level 1 commands

96h

NOP – Accepted for backward compatibility

97h

Accepted for backward compatibility . Use of this Feature is not recommended

9Ah

Set the host current source capability. Allows tradeoff between current drawn and

read/write speed.

BBh

4 bytes of data apply on Read/Write Long commands

CCh

Enable Power on Reset (POR) establishment of defaults at Soft Reset

Features 01h and 81h are used to enable and clear 8 bit data transfer modes in True IDE Mode. If the 01h feature

command is issued all data transfers will occur on the low order D7D0 data bus and the IOIS16 signal will not be

asserted for data register accesses.

Features 0Ah and 8Ah are used to enable and disable Power Level 1 commands. Feature 0Ah is the default

feature for the CompactFlash Storage Card with extended power.

Features 55h and BBh are the default features for the CompactFlash Storage Card; thus, the host does not have to

issue this command with these features unless it is necessary for compatibility reasons. Feature code 9Ah enables

the host to configure the card to best meet the host system’s power requirements. The host sets a value in the

Sector Count register that is equal to one-fourth of the desired maximum average current (in mA) that the card

should consume. For example, if the Sector Count register is set to 6, the card would be configured to provide the

best possible performance without exceeding 24 mA. Upon completion of the command, the card responds to the

host with the range of values supported by the card. The minimum value is set in the Cylinder Low register, and the

maximum value is set in the Cylinder Hi register. The default value, after a power on reset, is to operate at the

highest performance and therefore the highest current mode. The card will accept values outside this

programmable range, but will operate either at the lowest power or highest performance as appropriate.

Features 66h and CCh can be used to enable and disable whether the Power On Reset (POR)

Defaults will be

set when a soft reset occurs. The default setting is to revert to the POR defaults when a soft reset occurs.

Set Multiple Mode – C6h

Bit->

7

6

5

4

3

2

1

0

Command(7)

C6h

C/D/H(6)

X

Drive

X

Cyl High(5)

X

Cyl Low(4)

X

Sec Num(3)

X

Sec Cnt(2)

Sector Count

Feature(1)

X

Set Multiple Mode

This command enables the CompactFlash Storage Card to perform Read and Write Multiple operations and

establishes the block count for these commands. The Sector Count Register is loaded with the number of sectors

per block. Upon receipt of the command, the CompactFlash Storage Card sets BSY to 1 and checks the Sector

Count Register.

If the Sector Count Register contains a valid value and the block count is supported, the value is loaded for all

subsequent Read Multiple and Write Multiple commands and execution of those commands is enabled. If a block

count is not supported, an Aborted Command error is posted, and Read Multiple and Write Multiple commands are

disabled. If the Sector Count Register contains 0 when the command is issued, Read and Write Multiple