AT&T 3B2/300 Technical Reference Manual page 400

- - - - - - - - - - - - - - - - - - - - - - - - - - FUNCTIONAL DESCRIPTION
POWER
CIRCUITS
-
DYNAMIC
RANDOM
ACCESS
MEMORY
CONTROLLER
LEGEND:
CAS
CE
MA
MUXA
RAS
RE
SnEQUJP
WE
r--------------------------------,
+sv
GROUND
SIZEl[l]
SIZEO[l]
SnEQUIP[O]
MUXA08-00[l]
GO
BANKEN2[0]
BANKENl[O]
BANKENO[O]
CAS3-0[0]
WE[O]
RAS[O]
MD31-00[1]
MCBll-00[1]
I
CM523A 4-MEGABYTE RAM CARD
I
I
I
I
I
I
I
I
I
I
I
I
MAAS-0[1]
I
MABS-0[1]
I
ADDRESS
MACS-0[1]
I
DRIVERS MAD8-0rll
~
I
I
I
I
CE33-30[0]
I CE23-20[0]
-
-
CEJ3-JO[O]
I
CE03-00[0]
I
I
I
I
CONTROL
I DRIVERS
I
WE[3-0]![0]
WE[3-0]0[0]
-
I
-
I
I
RE[3-0]l[O]
I
RE[3-0]0[0]
I
-
I
I D3!-00[I]
I
DATA
~
I
TRANSCEIVERS
_ CBJJ-OOfll
-
I
-
-
I
DYNAMIC
RAM
(4M BYTE)
BANKO
o 32-256K X I BIT
o 12-256K X I BIT
(IM BYTE)
BANK I
o 32-256K X I BIT
o 12-256K X I BIT
(IM BYTE)
BANK
2
o 32-256K X I BIT
o 12-256K X I BIT
(IM BYTE)
BANK3
o 32-256K X I BIT
o 12-256K X I BIT
(IM BYTE)
L-------------------------------
Column Address Strobe
CAS Enable
Memory Address
Multiplexed Address
Row Address Strobe
RAS Enable
Slot n Equipped
Write Enable
_.J
Figure 3-44: CM523A 4-Megabyte RAM Card - Functional Block Diagram
FUNCTIONAL DESCRIPTION 3-147