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30 U Series CE Family Product Manual, Rev. A
Note.
At power-on, or after a hardware or software reset, the default
values of the features are as indicated above.
09
H
PIO mode 1
0A
H
PIO mode 2
0B
H
PIO mode 3
0C
H
PIO mode 4
(default)
20
H
Multiword DMA mode 0
21
H
Multiword DMA mode 1
22
H
Multiword DMA mode 2
40
H
Ultra DMA mode 0
41
H
Ultra DMA mode 1
42
H
Ultra DMA mode 2
43
H
Ultra DMA mode 3
44
H
Ultra DMA mode 4
45
H
Ultra DMA mode 5
05
H
Enable advanced power management.
42
H
Auto Acoustic Management
FE
H
Performance Seek
80
H
Quiet Acoustic Seek
55
H
Disable read look-ahead (read cache) feature.
82
H
Disable write cache.
AA
H
Enable read look-ahead (read cache) feature
(default).