AT&T 3B2/300 Technical Reference Manual page 402

- - - - - - - - - - - - - - - - - - - - - - - - - - - FUNCTIONAL DESCRIPTION
POWER
CIRCUITS
DYNAMIC
RANDOM
ACCESS
MEMORY
CONTROLLER
LEGEND:
CAS
CE
MA
MUXA
RAS
RE
SnEQUIP
WE
+sv
GROUND
SIZEl[l]
SIZEO[l]
SnEQUIP[O]
MUXA08-00[1]
GO
BANKENl[O]
BANKENO[O]
CAS3-0[0]
WE[O]
RAS[O]
MD31-00[l]
MCBll-00[1]
r--------------------------------,
I
CM523B 2-MEGABYTE RAM CARD
I
I
I
I
-
-
I
I
I
I
I
I
I
I
I
I
ADDRESS
MAB8-0[1]
I
DRIVERS
MAA8-0[!]
-
-
-
I
I
I
I
- -
I
~~!~-!~[~!
I
-
I
I
CONTROL
I
I
DRIVERS
I
WE!-0[0]
I
-
I
I
I
I REl-0[0]
I
- -
I
I
D31-00[1]
-
.
-
DATA
-
I
TRANSCEIVERS
.
CBll-00[1]
I
I
DYNAMIC
RAM
(2M BYTE)
BANKO
o 32-256K X I BIT
o 12-256K X I BIT
(IM BYTE)
BANK 1
o 32-256K X I BIT
o 12-256K XI BIT
(lM BYTE)
L-------------------------------
Column Address Strobe
CAS Enable
Memory Address
Multiplexed Address
Row Address Strobe
RAS Enable
Slot n Equipped
Write Enable
Figure 3-46: CM523B 2-Megabyte RAM Card - Functional Block Diagram
FUNCTIONAL DESCRIPTION 3-149