Side Select Schematic Diagram - Tandon TM-100-1 Operating And Service Manual

during an entire read or write operation. This signal is best implemented in synchronization with the Device Select
line signal (see Section 3.3.1.1 ).
Circuit Description
The Side Select signal comes in on Pin 32 of the interface connector. If this signal is high, Side O is selected. This
signal is buffered through IC 2E (see Figure 3-8). From there, the Side Select signal is sent through IC 2B and IC
3E to Drive Q7 or Drive Q6. Drive Q7 sends current to the upper head (Head 1 ). Drive Q6 sends current to the low-
er head (Head 0) .
N
511>E
ONE
..:lRITE 22 , _ _ - -
5
-------=-<
5
2E
E,
l>ATR
LS14
+12\/
(N
WRITE)
04
Figure 3-8
N INTERN<IL
w'RITE"
Busy
+12\/
+5\/
Side Select Schematic Diagram
3-12
t12V
R34
1-541<.
Ii'.
R35
71,g
1%
(N ERASE"
+sv
3
N INTEl'.-
NALWRITE
&u!>y
,. R57