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FDD412A/B
(5)
Write
+ Head
engage
off + Seek
(in outer
direction)
(1)
Initial
seek
(0 track
seek)
eel areca eoe ot Sasha (GS TS Sein Snes
ete
No
2
ie I
Ge
eos ae
UNIT SELECT 2°/2'-N
ea
sree Sky ee
READY-N
STEP DIRECTION-N
|
Reece
trie enemy
*.
=
TRACK 00-N
pe
ewe oe
eee
es
—die
go
ae,
STEP-N
3ms
35 ms
Positioning
completed
a)
The STEP pulse is issued
until
the TRACK
O0-N
goes
"low".
b)
The
STEP
DIRECTION-N
should
be "high"
while
the
STEP
pulse
is being
issued.
Fig. 2.31
0 Track Seek Timing
Chart
(2)
1
track
positioning
UNIT
SELECT-N
ON
RE ADY-N
HEAD
ENGAGE-N
STEP
DIRECTION-N
STEP—N
'Write
or
read
a)
This
seek
is
in
the
inner
direction.
available
b)
T, > 50 ns
.
c)
-T2 > 0
Fig. 2.32
1 Track Positioning
Timing
Chart
RE ADY-N
HEAD
ENGAGE-N
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