Interface
5-98 C141-E203-01EN
Table 5.25 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 or after COMRESET, 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
Serial ATA function
: Prohibited
•
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]
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