JVC MX-G68V Service Manual page 52

MX-G68V/MX-G65V
W24257 (MIC2) : CMOS static RAM
1. Pin layout
VDD WE A13 A8
26 25 24
27
28
3
2 4
1
A14 A12 A7 A6 A5
2. Pin function
Symbol
Pin No.
1 A14
2
A12
3
A7
4
A6
5
A5
6
A4
7
A3
8
A2
9
A1
10
A0
11
I/O1
12
I/O2
13
I/O3
14
VSS
15
I/O4
16
I/O5
17
I/O6
18
I/O7
19
I/O8
20
CS
21
A10
22
OE
23
A11
24
A9
25
A8
26
A13
27
WE
28
VDD
1-52
A9 A11 OE CS
A10 I/O8 I/O7 I/O6
22 21 20 19 18 17
23
5 6
7 8 9 10 11 12
A4 A3 A2 A1 A0
I/O1 I/O2
I/O
Function
I Address input
I Address input
I Address input
I Address input
I Address input
I
Address input
I
Address input
I
Address input
Address input
I
I Data Input/Output
Data Input/Output
I/O
I/O Data Input/Output
Data Input/Output
I/O
Ground
I/O Data Input/Output
I/O
Data Input/Output
Data Input/Output
I/O
Data Input/Output
I/O
Data Input/Output
I/O
Chip select Input
I
Address input
I
Out put enable
O
I Address input
I Address input
I
Address input
I Address input
I
Write Enable input
Power Supply
I/O5
I/O4
16 15
13
14
I/O3 VSS
3. Truth table
CS
H
L
L
L
L
OE
WE
X
X
H
H
H
H
L
H
L
X