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Table 5.6
Features Register
X'02'
Enables the write cache function.
X'03'
Specifies the transfer mode. Supports PIO mode 4, single word DMA mode 2,
and multiword DMA mode regardless of Sector Count register contents.
X'04'
No operation.
X'05'
Enable the advanced power management function.
X'33'
No operation.
X'42'
Enable Automatic Acoustic Management feature set
X'54'
No operation.
X'55'
Disables the read cache function.
X'66'
Disables the reverting to power-on default settings after software reset.
X'77'
No operation.
X'81'
No operation.
X'82'
Disables the write cache function.
X'84'
No operation.
X'85'
Disable the advanced power management function.
X'88'
No operation.
X'89'
No operation.
X'AA'
Enables the read cache function.
X'AB'
No operation.
X'BB'
Specifies the transfer of 4-byte ECC for READ LONG and WRITE LONG
commands.
X'C2'
Disable Automatic Acoustic Management feature set
X'CC'
Enables the reverting to power-on default settings after software reset.
At power-on or after hardware reset, the default mode is the same as that is set with a value
greater than X'AA' (except for write cache). If X'66' is specified, it allows the setting value
greater than X'AA' which may have been modified to a new value since power-on, to remain the
same even after software reset.
5 - 36
Features register values and settable modes
Drive operation mode
C141-E112-01EN
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