Hitachi ULTRASTAR 15K450 HUS154530VLF400 User Manual
Page 40
Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
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decode of the value on the DEV_CTRL_CODE signals.
The Hard Reset function uses a sequence of values on the DEV_CTRL_CODE signals. The sequence is 5, 1, 3, 2, 3, 1, 5. A
drive detecting a valid Hard Reset sequence shall perform the equivalent of a power-on-reset.
10 Kohm pull up resistors to 3.3 VOLTS are provided on the drive for both DEV_CTRL_CODE_ 2, DEV_CTRL_CODE_1
and DEV_CTRL_CODE_0 to be sure that each signal is maintained in its high state unless a low is provided from the back-
plane.
For more information refer to the SFF-8045 Specification.
Table 16: DEV_CTRL_CODE_N Signal Definition
Link Rate
DEV_CTRL_CODE_2
DEV_CTRL_CODE_1
DEV_CTRL_CODE_0
1.0625 GHz
1
1
1
2.1250 GHz
1
1
0
4.250 GHz
1
0
1
Reserved
1
0
0
Reserved
0
1
1
Reserved
0
1
0
Reserved
0
0
1
Power Failure Warning
0
0
0