HFDOM44S3RXXX Datasheet, PDF (22/30 Pages) Hanbit Electronics Co.,Ltd – 44Pin Flash Disk Module Min.16MB ~ Max.512MB, True IDE Interface

HANBit
HFDOM44S3Rxxx
Set Features - EFh
Bit->
7
6
5
4
3
2
1
0
Command(7) EFh
C/D/H(6)
X
Drive
X
Cyl High(5)
X
Cyl Low(4)
X
Sec Num(3)
X
Sec Cnt(2)
Configure
Feature(1)
Feature
Set Features
This command is used by the host to establish or select certain features. Table 45 defines all features that are
supported.
Feature Supported
Feature
Operation
01h
Enable 8 – bit data transfers
0Ah
Enable Power Level 1 commands
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
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Rev. 1.0 (January, 2005)
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