AT&T 3B2/300 Technical Reference Manual page 396

- - - - - - - - - - - - - - - - - - - - - - - - - - - FUNCTIONAL DESCRIPTION
POWER
CIRCUITS
DUAL
PORT
DYNAMIC
RANDOM
ACCESS
MEMORY
CONTROLLER
-
LEGEND:
CAS
CE
MA
MCEQUIP
MUXA
NC
RAS
RE
WE
r--------------------------------,
+5V
GROUND
ONEBANK[O]
SIZE64K[O]
MCEQUIP[O]
MUXA9-l[l]
MUXAO[l]
BANKENl[O]
BANKENO[O]
CAS3-0[0]
WE[O]
RAS[O]
MD31-00[l]
MPAR3-0[l]
I
CM191D 2-MEGABYTE RAM CARD
I
I (SURFACE MOUNTED, FULL HEIGHT)
I
I
-
-
I
I
I
I
I
I
I
I
I
.
I
ADDRESS
I
DRIVERS MAS-0[1]
-
I
-
I
I
NC
-
I
I
I
I
CE13-10[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
I
DYNAMIC
RAM
(2M BYTE)
BANKO
o 32-256K X I BIT
o 4-256K X I BIT
(IM BYTE)
BANK I
o 32-256K X I BIT
o 4-256K X I BIT
(IM BYTE)
L-------------------------------
Column Address Strobe
CAS Enable
Memory Address
Memory Card Equipped
Multiplexed Address
No Connection
Row Address Strobe
RAS Enable
Write Enable
_.J
Figure 3-42: CM191D 2-Megabyte, Surface Mounted, Full Height, RAM Card - Functional Block
Diagram
FUNCTIONAL DESCRIPTION 3-143