AT&T 3B2/300 Technical Reference Manual page 394

- - - - - - - - - - - - - - - - - - - - - - - - - - FUNCTIONAL DESCRIPTION
POWER
CIRCUITS
DUAL
PORT
DYNAMIC
RANDOM
ACCESS
MEMORY
CONTROLLER
LEGEND:
CAS
CE
MA
MCEQUIP
MUXA
NC
RAS
RE
WE
r-------------------------------,
+5V
I
CM191B I-MEGABYTE RAM CARD
I
-
GROUND
I
I
I
ONEBANK[O]
I
I
I
SIZE64K[O]
I
MCEQUIP[O]
I
I
I
MUXA9-1[1] I
ADDRESS
I
DRIVERS
MAS-0[1]
I
-
I
MUXAO[l]
I
I
-
I
-
NC
DYNAMIC
BANKENl[O]
I
RAM
.
NC
I
-
(lM BYTE)
I
BANKENO[O]
I
I
CE3-0[0]
o 8-256K X 4 BIT
CONTROL
-
o
4-256K X I BIT
CAS3-0[0]
I
DRIVERS
WEl-0[0]
I
-
WE[O]
I
I
REl-0[0]
-
.
-
RAS[O] I
I
MD31-00[1]
I
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
- _ .J
Figure 3-40: CM191B I-Megabyte RAM Card - Functional Block Diagram
FUNCTIONAL DESCRIPTION 3-141