AT&T 3B2/300 Technical Reference Manual page 393

FUNCTIONAL D E S C R I P T I O N - - - - - - - - - - - - - - - - - - - - - - - - - -
POWER
CIRCUITS
-
-
-
-
DUAL
PORT
DYNAMIC
RANDOM
ACCESS
MEMORY
CONTROLLER
LEGEND:
CAS
CE
MA
MCEQUIP
MUXA
NC
RAS
RE
WE
r------------------------------,
+SV
: CM191A O 25-MEGABYTE RAM CARD
GROUND
I
I
I
I
ONEBANK(O]
I
I
SIZE64K(O] I
MCEQUIP(O]
I
I
I
I
MUXA7-0(1]
I
ADDRESS
MA7-0[l]
I
DRIVERS
-
I
I
I
DYNAMIC
MUXA9-8(1]
I -
NC
RAM
I
-
(256K BYTES)
BANKENI(O]
I
-
NC
-
I
I
BANKENO(O]
I
CE3-0[0]
CONTROL
-
-
o 8-64K X 4 BIT
CAS3-0(0]
I
DRIVERS
o 4-64K X I BIT
I
WEI-0[0]
-
I
-
WE[O]
I
REI-0[0]
-
~
RAS[O]
I
I -
I
MD31-00[l]
I
I
I
MPAR3-0(1]
I
I
-
-
I
I
L-----------------------------
Column Address Strobe
CAS Enable
Memory Address
Memory Card Equipped
Multiplexed Address
No Connection
Row Address Strobe
RAS Enable
Write Enable
Figure 3-39: CMl 91A 0.25-Megabyte RAM Card - Functional Block Diagram
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