Sony BKDS-PA3291, Руководство по обслуживанию

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6-5
BVS-A3232/V3232
IC
C-MOS 256K (32768x8)-BIT STATIC RAM
—TOP VIEW—
A14
IN
A12
IN
A7
IN
A6
IN
A5
IN
A4
IN
A3
IN
A2
IN
A1
IN
A0
IN
I/O 1
I/O 2
I/O 3
WE
IN
A13
IN
A8
IN
A9
IN
A11
IN
OE
IN
A10
IN
CE
IN
I/O 8
I/O 7
I/O 6
I/O 5
I/O 4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15 GND
V
DD
(+5V)
10
11
9
8
7
6
5
4
3
25
24
21
23
2
26
1
22 27 20
A0
I/O 1
12
I/O 2
13
I/O 3
15
I/O 4
16
I/O 5
17
I/O 6
18
I/O 7
19
I/O 8
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
OE
WE CE
A0-A14 ; ADDRESS INPUTS
CE ; CHIP ENABLE INPUT
I/O1-I/O8 ; DATA INPUTS/OUTPUTS
OE ; OUTPUT ENABLE INPUT
WE ; WRITE ENABLE INPUT
CE
1
0
0
0
OE
X
1
0
X
WE
X
1
1
0
MODE I/O TERMINAL
NOT SELECT
OUTPUT DISABLE
READ
WRITE
HIGH IMPEDANCE
HIGH IMPEDANCE
OUTPUT DATA
INPUT DATA
0
1
X ; LOW LEVEL
; HIGH LEVEL
; DON'T CARE
CXK58257ASP-10L (SONY)
A14
A13
A12
A11
A9
A8
A7
A6
A5
1
26
2
23
24
25
3
4
5
A10
A4
A3
A2
A1
A0
21
6
7
8
9
10
22
27
20
OE
WE
CE
BUFFER
BUFFER
BUFFER
ROW
DECODER
MEMORY
MATRIX
512 X 512
I/O GATE
COLUMN
DECODER
I/O
BUFFER
19
18
17
16
15
13
12
11
I/O 8
I/O 7
I/O 6
I/O 5
I/O 4
I/O 3
I/O 2
I/O 1
1
2
3
4
5
6
7
8
A0
EN
S1
S2
S3
S4
D
16
15
14
13
12
11
10
9
V
SS
(-15V)
V
DD
(+15V)
GND
A1
A2
S5
S6
S7
S8
S1
S2
S3
S4
S5
S6
S7
S8
4
5
6
7
12
11
10
9
–TOP VIEW–
C-MOS 8-CHANNEL SINGLE-ENDED ANALOG MULTIPLEXER
8
D
A0
A1
A2
EN
1
16
15
2
DECODERS/DRIVERS
DG408DJ (SILICONIX)
C-MOS ELECTRICALLY ERASABLE PROGRAMMABLE LOGIC DEVICE
—TOP VIEW—
14
15
16
AND/OR
LOGIC
ARRAY
2
3
4
5
6
7
8
9
1
19
18
17
16
15
14
13
12
11
OE
OE
IN
I/O
CK
17
18
19
20
13
V
DD
(+5V)
GND
CK
IN
OE
IN
12
11 10
9
8
7
6
5
4
3
2 IN 1
IN 2
IN 3
IN 4
IN 5
IN 6
IN 7
IN 8 I/O 0
I/O 1
I/O 2
I/O 3
I/O 4
I/O 5
I/O 6
I/O 7
1
MACRO
CELL
CK
GAL16V8B-25LP (LATTICE)
PALCE16V8H-25PC/4 (AMD/MONOLITHIC MEMORIES)