AT&T 3B2/300 Technical Reference Manual page 401

FUNCTIONAL D E S C R I P T I O N - - - - - - - - - - - - - - - - - - - - - - - - - - -
r--------------------------------,
rU . . llJ<.
CIRCUITS
DYNAMIC
RANDOM
ACCESS
MEMORY
CONTROLLER
LEGEND:
CAS
CE
MA
MUXA
RAS
-
RE
SnEQUIP
WE
: CM523AA 4-MEGABYTE RAM CARD
I
+5V I
I
GROUND
I
I
.
I
SIZEl[l]
I
SIZEO[l]
I
I DYNAMIC
I RAM
ECCEQP[O]
I
(4M BYTE)
I
A "
MUXA09-00[1]
I
DRIVERS
MAA9-0[1]
-
-
-
I
I
I
ONLY!
GO
I
BANK
-
(BANK
0)
I
CELA-B[O]
I
- ~ • A
n,n,
-
BANKENl[O]
I
BANKENO[O]
I
I
CONTROL
I
DRIVERS
WEL[O] o 32-1024K X I BIT
CAS3-0[0]
I
WEH[O]
o 12-1024K X I BIT
-
WE[O]
I
I
RAS[O]
I
I
REL[O]
I
REHIOl
I
-
I
MD31-00[1]
I
I
D3!-00[I]
-
I DATA
-
MCBll-00[1]
I TRANSCEIVERS
CBll-00[1]
I
-
I
L-------------------------------
Column Address Strobe
CAS Enable (Low and High)
Memory Address
Multiplexed Address
Row Address Strobe
RAS Enable (Low and High)
Slot n Equipped
Write Enable (Low and High)
Figure 3-45: CM523AA 4-Megabyte RAM Card - Functional Block Diagram
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