Figure 4.8 shows the max seek current waveform of +5V DC and +12V DC.
+5VDC |
|
|
|
| MBA3300NC | MBA3147NC | MBA3073NC |
| MBA3300NP | MBA3147NP | MBA3073NP |
Current (500mA/div) | Current (500mA/div) |
| Current (500mA/div) |
| Time (10 msec/div) | Time (10 msec/div) | Time (10 msec/div) |
+12VDC |
|
|
|
| MBA3300NC | MBA3147NC | MBA3073NC |
| MBA3300NP | MBA3147NP | MBA3073NP |
Current (500mA/div) | Current (500mA/div) |
| Current (500mA/div) |
| Time (10 msec/div) | Time (10 msec/div) | Time (10 msec/div) |
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.
Figure 4.9 Power on/off sequence (1)
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