AT&T 3B2/300 Technical Reference Manual page 397

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
+5V
GROUND
ONEBANK[O]
SIZE64K[O]
MCEQUIP(O]
MUXA9-1[1]
MUXAO(l]
BANKENl[O]
BANKENO[O]
CAS3-0(0]
WE[O)
RAS(O]
MD31-00(1]
MPAR3-0(1]
r--------------------------------,
I
CM192B 2-MEGABYTE RAM CARD
I
I (SURFACE MOUNTED, HALF HEIGHT)
I
I
I
-
I
I
I
I
I
I
I
I
I
I
ADDRESS
I
DRIVERS
MAB-0(1]
-
I
-
I
I
-
NC
-
I
I
I
I
CEI3-10(0]
I
CE03-00(0]
I
I
CONTROL
-
I
DRIVERS
WE3-0[0]
I
I
RE3-0(0]
.
I
I
I
I
I
I
I
-
I
I
DYNAMIC
RAM
(2M BYTE)
BANKO
o
8-256K X 4 BIT
o 4-256K X I BIT
(IM BYTE)
BANK 1
o 8-256K X 4 BIT
o
4-256K X I BIT
(lM BYTE)
L-------------------------------
Column Address Strobe
CAS Enable
Memory Address
Memory Card Equipped
Multiplexed Address
No Connection
Row Address Strobe
RAS Enable
Write Enable
Figure 3-43: CMl 928 2-Megabyte, Surface Mounted, Half Height, RAM Card - Functional Block
Diagram
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