Panasonic WJFS616 - SWITCHER, Руководство по обслуживанию

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15
A12 2
A7 3
A6 4
A5 5
A4 6
A3 7
A2 8
28 Vcc
27 WE
26 A13
25 A8
24 A9
23 A11
22 OE
21 A10
(TOP VIEW)
A1 9
A0 10
19 I/O8
20 CE
A14 1
I/O3 13
GND 14 15 I/O4
16 I/O5
15 I/O4 I/O
16 I/O5 I/O
17 I/O6 I/O Data Input/Output terminals. (8-Bit)
18 I/O7 I/O
19 I/O8 I/O
21 A10 I Address signal input terminals.
22 OE I Output Enable signal terminal.
23 A11 I
24 A9 I
25 A8 I
I/O1 11
I/O2 12
17 I/O6
18 I/O7
20 CE I Chip Enable signal input terminal.
28 Vcc – Power Supply terminal.
26 A13 I
27 WE I Write Enable signal input terminal.
Pin Name I/O Description
1 A14 I
2 A12 I
3 A7 I
4 A6 I
5 A5 I
6 A4 I
7 A3 I
8 A2 I
9 A1 I
10 A0 I
11 I/O1 I/O
12 I/O2 I/O Data Input/Output terminals. (8-Bit)
13 I/O3 I/O
14 GND – Ground terminal.
Address signal input terminals.
Address signal input terminals.
BUFFER
BUFFER
BUFFER
ROW DECODER
MEMORY MATRIX ( 256 x 256 )
I/O GATE COLUMN DECODER
I/O BUFFER
14 GND
28 Vcc
1
26
2
23
24
25
3
4
21
6
7
8
9
22
27
20
11
12
13
15
16
18
19
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
I/O8
WE
CE
OE
A1
A2
A3
A4
A10
A6
A7
A8
A9
A11
A12
A13
A14
17
5 A5
10 A0
1.4.
IC99 on the Switch Board is using the 32,765-Word x 8-Bit High Speed CMOS Static RAM IC YWK58257BM70.
Description of this IC is as follows: