Figure 2.8 Current Waveform (+12 Vdc); Figure 2.9 Power On/Off Sequence - Fujitsu M2266S Technical Handbook

SCSI device
supplying power (+ 5 VDC)
to TERMPWR
4.0 V
\4 0 V
Tj0
T2 0
/
Figure 2.9 Power On/Off Sequence (1)
4.0 V
IDD
(+5 VDC)
M2266S/H
Technical Handbook
(a)
(A)
5
4
I
At start of spindle motor
rotation
(b)
(A)
5
4
3
2
1
Seek, read, and seek
(0--> 500 CYL)
'Iu • 1
?%M~~ 44
3
2
5 10 15 20 25 (s)
10 20
30 (ms)
Figure 2.8 Current Waveform (+12 VDC)
Power On/Off Sequence
(a) The order of the power on/off sequence of +5 VDC and +12 VDC,
supplied to the IDD, does not matter.
(b) In a system that uses the terminating resistor power supply signal
(TERMPWR) on the SCSI bus, the requirements of +5 VDC shown in
Figure 2.9 must be satisfied between the IDD and at least one of the SCSI
devices supplying power to that signal.
2-8 FS810125-01
. . .
A Fujitsu America, Inc.