Fujitsu MHT2020AT, Product Manual

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Interface
5-44 C141-E192-01EN
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. (*1)
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.
(*1)
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
: State keeping
Read cashe function : Enabled