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5-102 C141-E224
Table 5.26 Features field values and settable modes (2/2)
Features
Field
Drive operation mode
X ' AA ' Enables the read cache function.
X ' BB '
Specifies the transfer of 4-byte ECC for READ LONG and WRITE LONG
commands. (Note)
X ' C2 ' Disables the Acoustic management function.
X ' CC ' Enables the reverting to power-on default settings after software reset. (Note)
Note: Although there is a response to the command, nothing is done.
At power-on, 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
At power-on or COMRESET, the default mode of Serial ATA function is set as
follows:
DMA Setup FIS Auto-Activate optimization : Disabled
Device-initiated interface power state Transitions : Disabled
Software Settings Preservation : Enabled
• Error reporting conditions
(1) An undefined code is specified in the FR or SC field (ST = 51h, ER = 04h).
(2) A SATA communication error occurred (ST = 51h, ER = 14h).
At command issuance (Shadow Block O registers setting contents)
CM 1 1 1 0 1 1 1 1
DH x x x x xx
CH
CL
SN
SC
FR
xx
xx
xx
xx or *1~3
[See Table 5.6]