| Table 5.6 Features register values and settable modes |
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Features Register | Drive operation mode |
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X‘02’ | Enables the write cache function. |
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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. |
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X‘04’ | No operation. |
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X‘05’ | Enable the advanced power management function. |
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X‘33’ | No operation. |
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X‘42’ | Enable Automatic Acoustic Management feature set |
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X‘54’ | No operation. |
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X‘55’ | Disables read cache function. |
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X‘66’ | Disables the reverting to |
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X‘77’ | No operation. |
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X‘81’ | No operation. |
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X‘82’ | Disables the write cache function. |
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X‘84’ | No operation. |
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X‘85’ | Disable the advanced power management function. |
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X‘88’ | No operation. |
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X‘89’ | No operation. |
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X‘AA’ | Enables the read cache function. |
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X‘AB’ | No operation. |
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X‘BB’ | Specifies the transfer of |
| commands. |
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X‘C2’ | Disable Automatic Acoustic Management feature set |
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X‘CC’ | Enables the reverting to |
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| 5 - 37 |