Fujitsu MBA3147NC 用户手册
Figure 4.8 shows the max seek current waveform of +5V DC and +12V DC.
MBA3300NC
MBA3300NP
MBA3147NC
MBA3147NP
MBA3073NC
MBA3073NP
Current
(500m
A
/d
iv)
Time (10 msec/div)
Curre
nt
(500m
A
/di
v)
Time (10 msec/div)
C
ur
ren
t (5
00
mA/d
iv
)
Time (10 msec/div)
+5VDC
MBA3300NC
MBA3300NP
MBA3147NC
MBA3147NP
MBA3073NC
MBA3073NP
C
urre
nt
(500mA/
di
v)
Time (10 msec/div)
C
ur
ren
t (5
00
mA/d
iv
)
Time (10 msec/div)
Current
(500m
A
/d
iv)
Time (10 msec/div)
+12VDC
Figure 4.8 Current waveform (Max seek)
(3)
Power on/off sequence
a) The order of the power on/off sequence of +5V DC and +12V DC, supplied to the HDD, does
not matter.
b) In a system which uses the terminating resistor power supply signal (TERMPWR) on the
SCSI bus, the requirements for +5V DC given in Figure 4.9 must be satisfied between the
HDD and at least one of the SCSI devices supplying power to that signal.
HDD and at least one of the SCSI devices supplying power to that signal.
Figure 4.9 Power on/off sequence (1)
C141-E270
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