General specifications for memory used on both cards are:
Access - 250
ns
Cycle - 410
ns
Memory Module Description
Each option contains
18
dynamic memory modules. The 32KB
Memory Expansion Option utilizes 16K x 1 bit modules and the
64KB Memory Expansion Options utilizes
32K
x 1 bit modules.
Both memory modules require three voltage levels (+5Vdc, -5Vdc,
+ 12V dc) and 128 refresh cycles every 2 msec. Absolute maximum
access times are:
From RAS: 250 ns
From CAS: 165
ns
Table
19.
Memory Module Pin Configuration
PIN
16K
X 1
BIT
MODULE
NO.
(Used
on
32KB
Card)
1
-
5V
2
Data
In
**
3 -
Write
4
-
RAS
5
AO
6
A2
7
Al
8
+12V
9
+
5V
10
A5
11
A4
12
A3
13
A6
14
Data
Out
**
15
-
CAS
16
GND
17
-
*
18
-
*
32K
X 1
BIT
MODULE
(Used
on
64KB
Card)
-
5V
Data
In
**
-
Write
-
RAS
0
-
RAS
1
AO
A2
A1
+12V
+
5V
A5
A4
A3
A6
Data
Out
**
-
CAS
1
-
CASO
GND
*
16K
X 1
bit
m.odule
has
only
16
pins.
**
Data
In
and
Data
Out
are
tied
together
(three
state
bus).
2-114
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