Panasonic WJ-FS216 Service Manual page 11

1.2.
IC403, IC404 and IC616 on the Main Board are using the Dynamic RAM IC HM14265DJ68.
Description of this IC is as follows:
Vcc 1
I/O0 2
I/O1 3
I/O2 4
I/O3 5
Vcc 6
I/O4 7
I/O5 8
I/O6 9
I/O7 10
(TOP VIEW)
N.C. 11
N.C. 12
WE 13
RAS 14
N.C. 15
A0 16
A1 17
A2 18
A3 19
Vcc 20
Pin Name I/O
1 Vcc – Power supply terminal.
2 I/O0 I/O
3 I/O1 I/O
Data input/output terminals. (16-Bit)
4 I/O2 I/O
5 I/O3 I/O
6 Vcc – Power supply terminal.
7 I/O4 I/O
8 I/O5 I/O
Data input/output terminals. (16-Bit)
9 I/O6 I/O
10 I/O7 I/O
11 N.C. – Non connection.
12 N.C. – Non connection.
13 WE I Write Enable signal input terminal.
14 RAS I Row Address Strobe signal input
terminal.
15 N.C. – Non connection.
16 A0 I Address signal input terminals. (9-Bit)
40 Vss
39 I/O15
38 I/O14
37 I/O13
36 I/O12
35 Vss
34 I/O11
33 I/O10
32 I/O9
31 1/O8
30 N.C.
29 LCAS
28 UCAS
27 OE
26 A8
25 A7
24 A6
23 A5
22 A4
21 Vss
Description
Pin Name I/O
17 A1 I
18 A2 I Address signal input terminals. (9-Bit)
19 A3 I
20 Vcc – Power supply terminal.
21 Vss – Ground terminal.
22 A4 I
23 A5 I
24 A6 I Address signal input terminals. (9-Bit)
25 A7 I
26 A8 I
27 OE I Output Enable signal input terminal.
28 UCAS I Upper Column Address Strobe signal
input terminal.
29 LCAS I Lower Column Address Strobe signal
input terminal.
30 N.C. – Non connection.
31 I/O8 I/O
32 I/O9 I/O
Data input/output terminals. (16-Bit)
33 I/O10 I/O
34 I/O11 I/O
35 Vss – Ground terminal.
36 I/O12 I/O
37 I/O13 I/O
Data input/output terminals. (16-Bit)
38 I/O14 I/O
39 I/O15 I/O
40 Vss – Ground terminal.
9
Description