Fujitsu MHS2020AT, Product Manual

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Interface
5-44 C141-E171-03EN
Table 5.5 Features register values and settable modes
Features
Register Drive operation mode
X’02’ Enables the write cache function.
X’03’ Set the data transfer mode. *1
X’05’ Enables the advanced power management function. *2
X’42’ Enables the Acoustic management function. *3
X’55’ Disables read cache function.
X’66’ Disables the reverting to power-on default settings after software reset.
X’82’ Disables the write cache function.
X’85’ Set the advanced power management mode to the default mode.
X’AA’ Enables the read cache function.
X’BB’ Specifies the transfer of 4-byte ECC for READ LONG and WRITE LONG
commands.
X’C2’ Disables the Acoustic management function.
X’CC’ Enables the reverting to power-on default settings after software reset. (*1)
*1 Although there is a response to the command, nothing is done.
At power-on or after hardware reset, the default mode is set as follows.
Write cashe function : Enabled
Transfer mode : PIO Mode-4, Multiworld DMA Mode-2
Advanced power
management function
: Enabled (Mode-1)
Acoustic
management function
: Disabled (Standard Seek)
Read cashe function : Enabled
Default setting
after software reset
: Disabled