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FDD412A/B
(4)
HEAD 1 SELECT-N
[Write
operation]
;
(
HEAD]
|!
i
Li
|
SELECT-N | |
i
it
iT,
4
le
ieee
Sr wa
;
Ra a
t
i
t
Ty
To
Ts
T,; > 50 us...
T3
> 50 Us
T2 > 0
T,
> 580
us
'H'
level
=
HEAD
0
"L'
level
= HEAD
1
(5)
STEP
DIRECTION-N
STEP
DIRECTION-N
|
STEP-N
4
Faas
a
—|
T;
> 50
ns
T2
> 0
"'H'
level
=
in outer
direction
'L'
level
=
in
inner
direction
(6)
STEP-N
STEP! -< «0 + (ee
ee
Se
ee
Si
a
BIRECTIONSN
=p
a
ge Se
ee
STEP-N
L
Tayi
& T34
~T3--—— Ta
—
§
WRITE GATE-N
tt
T>
—
—+Tp—
rt
!
T, > 50 ns
*
Ts > 580
us
.2ms
> Tg
> lus
Te > O
T3
> 3 ms
Tz : Read/write
inhibit
area
T, > 35 ms
(settling-time)
Step pulse
count
=] Current
cylinders' No. - New Cylinders'
No.
Fig.
2.46
STEP-N Signal
Timing
—36—
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