
4 - 5
4 - 5
OE
WE
LCAS
UCAS
CAS
WE
OE
DATA I/O BUS
COLUMN DECODERS
SENSE AMPLIFIERS
MEMORY ARRAY
262,144 x 16
ROW DECODER
DATA I/O BUFFERS
CAS
CLOCK
GENERATOR
WE
CONTROL
LOGICS
OE
CONTROL
LOGIC
I/O0-I/O15
RAS
RAS
A0-A8
RAS
CLOCK
GENERATOR
REFRESH
COUNTER
ADDRESS
BUFFERS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
VCC
I/O0
I/O1
I/O2
I/O3
VCC
I/O4
I/O5
I/O6
I/O7
NC
NC
WE
RAS
NC
A0
A1
A2
A3
VCC
GND
I/O15
I/O14
I/O13
I/O12
GND
I/O11
I/O10
I/O9
I/O8
NC
LCAS
UCAS
OE
A8
A7
A6
A5
A4
GND
BLOCK DIAGRAM
BLOCK DIAGRAM
CONTROL
OUTPUT
BUFFER
DECODER
CORE
ARRAY
Q0
Q7
.
CE
OE
A0
.
PGM
V
GND
CC
V
PP
A17
PIN DESCRIPTION
SYMBOL
DESCRIPTION
A0
−
A17
Address Inputs
Q0
−
Q7
Data Inputs/Outputs
CE
Chip Enable
OE
Output Enable
PGM
Program Enable
V
PP
Program/Erase Supply Voltage
V
CC
Power Supply
GND
Ground
BA3313L
W27C 020
IS41C16256
BLOCK DIAGRAM OF INTEGRATED CIRCUIT
IS41C16256
Summary of Contents for Expanium AZ 5150
Page 19: ...6 1 6 1 WIRING DIAGRAM ...
Page 20: ...7 1 7 1 TUNER BOARD CIRCUIT DIAGRAM ...
Page 22: ...8 1 8 1 MAIN BOARD CIRCUIT DIAGRAM ...
Page 23: ...8 2 8 2 MAIN BOARD LAYOUT DIAGRAM RECTIFIER BOARD LAYOUT DIAGRAM ...
Page 24: ...9 1 9 1 V V CASSETTE BOARD CIRCUIT DIAGRAM ...
Page 26: ...10 1 10 1 VCD BOARD CIRCUIT DIAGRAM ...
Page 27: ...10 2 10 2 VCD BOARD LAYOUT DIAGRAM COPPER SIDE VIEW ...
Page 28: ...10 3 10 3 VCD BOARD LAYOUT DIAGRAM COMPONENT SIDE VIEW ...