Sharp FDD-412A Service Manual page 43

(7).
(8)
(9)
UNIT
(10)
(i)
FDD412A/B
FAULT RESET-N
FAULT RESET-N
aaa ace Ti-> 200 ns
Ho ob
a
' Ts
Fig. 2.47 FAULT RESET-N Signal Timing
HEAD ENGAGE-N
HEAD ENGAGE-N ON a a
' '
—__— ————— a}
1 Ti :
T, > 50 ms read/write inhibit area.
"Low' level must not be reached if the FDD is not in ready
state.
Fig. 2.48 HEAD ENGAGE-N Signal Timing
UNIT SELECT 2°/2')-N
Device address
Oo 1 2 3
0 1
SELECT 2 /2 -N
-—_—— Controllable
—-
! area
Fig. 2.49 UNIT SELECT Signal Timing
MFM GATE-N
"rp TTT ry
MFM GATE-N fe a
Fig. 2.50 MFM GATE-N Signal Timing
DOOR LOCK SET-N
DOOR LOCK RESET-N
we Ty T—-
i
| 2 il + 2
a