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DOOR lOCK lATCH OPTION (FIG. 2-12)
This option can be used if the IN USE-option
is already installed. Then, the door lock latch
option will allow the latching of the door lock
solenoid under control of the SElECT and IN USE
signals without keeping the IN USE signal active.
The IN USE-Fr stores the state of the IN USE-
signal when the drive is selected (see Fig. 2-13).
The door lock solenoid remains activated even
if the mini disk drive is deselected and the
IN USE-signal is deactivated. To unlock the
door, the mini disk drive must be selected
again with IN USE inactive (low). To enable
the Ooor lock latch Option, a jumper must be
installed on JJ2 between Pins 11 and 12.
1/0
ENA
POWER ON RESET I
FIG. 2 - 13 OOOR lOCK OPTION
IN USE
INT SElECT
IN USE FF
FRONT UOOR
UNL
K
LO K
UNLOCK
FIG. 2 - 13 TIMING OIAGRAM OOOR LOCK LATCH
OPTION
2 - 9
IN USE OPTION
Pin 34 of the interface can be used for the
IN USE option if JJ2 is jumpered from Pins 13
to 14. The IN USE-signal is used to turn on
the door lock solenoid, also the IN USE-signal
can be used to turn on the activity LED.
If the IN USE option is used the OISK CHANGE
option must be disabled by removing the jumper
on JJ2 between Pins 11 and 12.
WRITE PROTECT OPTION
This option allows the user to decide in which
fashion the mini disk is protected against over-
writing by setting of jumpers. The user can
protect the mini disk if the notch is open,
or if the notch is covered, as shown on the
following table.
• JUMPER
NOTCH OPEN
NOTCH COVEREO
JJ4:3-4
unprotected
protected
JJ3:5-6
JJ3:3-4
protected
unprotected
TAßlE 2 - 3 WRITE PROTECT JUMPERING
STEPPER MOTOR SWITCHING
REMARKS
ECMA
Standard
opt ional
The stepper motor can be switched on and off by
the MOTOR ON-signal, if there is a jumper
installed between JJ4 Pins 1 and 2. If this
jumper i5 installed, the mini disk drive must
be repositioned by a recalibrate operation every
time the drive and stepper motors are turned on.
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