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FDD412A/B
(16)
DISKETTE
II
SENSE-N
READY-N
DISKETTE
If
SENSE-N
Two-sided
floppy
disk
:
'L'
level
Single-sided
floppy
disk:
'H'
level
Fig.
2.58
DISKETTE
II SENSE Signal
Timing
(17)
READY O-N (Unit 0)
READY 1-N (Unit 1)
READY 2-N (Unit 2)
READY 3-N (Unit 3)
DOOR
CLOSE-N
|
MTR SPD OK-N
ae
READY
n-N
MTR
SPD
OK-N:
A signal
from
the
spindle
motor,
at
'Low'
level
at
a fixed
rotational
speed
or
lower.
READY
n
:
A signal
that
is output
after
2 indexes
are
detected
following
the
MTR
SPD
OK
Fig. 2.59
READY Signal
Output Timing
(18)
FAULT-N
The
FAULT-N
signal
'Low'
when:
(a)
The WRITE
GATE comes
in while
the
device
is not
ready,
(b)
The
WRITE
GATE
comes
in while
the
head
is not loaded
on,
(c)
The HEAD 1 SELECT comes
in while
a single-sided
floppy disk
is
mounted,
or
(d)
The
WRITE
DATA
does
not
come
in
spite
of the
WRITE
GATE
. has
come
already.
Data
write
operation
is
inhibited.
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