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A.l
LOCAL STORAGE CARD
AND
STORAGE
PROTECTION CARD
A.1.1 FUNCTIONAL DESCRIPTION
A 64 X 10 self-contained functional
three-dimensional
storage-array
card
(including word drivers,
storage
elements
,
bit
drivers,
sense amplifiers
and
a voltage
reguLi.tor) is used for local storage and
storage
protection.
When the
storage
protection feature is present, the two
cards (Figure A-1) can
be
swapped for
diagnostic purposes.
'Ihe
inputs to the
storage unit are an
ax
by SY matrix.
Appendix A.
Special Circuits
Two modes of operation are poosible:
1.
A write operation, or
2.
A nondestructive read
ope
ration CNDR).
The NDR operation is accomplished by
supplying a valid
addres
s
Cone
X- and one
Y-line selected), and sampling
the
output
by conditioning the sense amplifier gate
on.
(If minimum access time
is
not needed,
the sense
amplifier
gate can
be left
on at
all
times.)
The write operation requires a
valid address input, 10 data
input
s
,
and
a
bit
driver timing
pulse
(timed
w'rite
instruction), all of
which
must be
coincident.
All
sig
nal
input and output
lines are compatible
with
SLD/SLT
circuits
.
Figure A-1
.
. Local Storage and Storage Protection Card
2025 FEMM
(7/69)
A-1
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