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NOTE
T his i s
a st r a p p a bl e f e a t u r e
w ith th e M o tor Control 3 i n p u t
signal line.
DISK CHANGE
This strappable feature provides a tru e (l owl
s ignal t o t h e i n t e r f ace when D r i v e Select i s
activated if t h e d r iv e has gone from a Ready
to a
N o t R e ad y c o n di t ion w h i l e d e selected.
This line is reset on the true-to-false transition
o f Dr iv e S elect i f t h e d r i v e h a s g on e t o a
Ready condition.
TWO-SIDED
T his o p tio n i s ava i l a b l e o n l y on M ode l
T M848-2E. Tru e ( l ow ) i n d i c ates t ha t a t w o -
sided diskette is installed.
+ TRUE
7438 OR
LEQUIVALENT
DRIVER
FIGURE 3-1
ELECTRICAL INTERFACE CHARACTERISTICS
TYPICAL INTERFACE
CHARACTERISTICS
Lines between the controller and the drive
have the following characteristics:
=
V ,
T r u e
F a l s e =
V ,
Figure 3- 1 c o n t ain s t h e e l e ct r i cal i n t e r f a ce
characteristics. Figure 3-2 contains the control
and data timing reauirements.
3.5 D . C. POWER
D. C. power is supplied to the dr ive thr ough a
s ix-pin A M P
c ircuit
b o a r d . T h e mat i n g c o n n e ctor, n o t
+5V
TRANSMISSION
LINE ~
10 FEET
I RECEIVER
3-6
+ 0.4 volt maximum at I
=
48 milliamperes, maximum
+ 2.4 volts minimum open
=
250
collector at I,
microamperes, maximum
c o n n ector, J2, m o u n ted on t h e
150 OHMS
?4LS14 OR
EQUIVALENT
+ TRUE
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