Sony HSR-1 Service Manual page 18

IC
IDT71024S15Y-TL (IDT)
C-MOS 1 M (128 x 8)-BIT SRAM
—TOP VIEW—
1 NC V 32
DD
A16 2 31 A15
IN
A14 3 30 CS2
IN
WE
A12 4 29
IN
A7 5 28 A13
IN
A6 6 27 A8
IN
A5 7 26 A9
IN
A4 8 25 A11
IN
OE
A3 9 24
IN
A2 10 23 A10
IN
CS1
A1 11 22
IN
A0 12 21 I/O7
IN
I/O0 13 20 I/O6
I/O1 14 19 I/O5
I/O2 15 18 I/O4
16 GND 17 I/O3
12
A0
11
A1
10
A2
9
A3
8
A4
7
A5
6
A6
5
A7
ADDRESS
27
A8
DECODER
26
A9
23
A10
25
A11
4
A12
28
A13
3
A14
31
A15
2
A16
13 - 15
17 - 21 8
I/O0 - I/O7
8
29
WE
24
OE CONTROL
22
CS1 LOGIC
30
CS2
LM2940CSX-5.0 (NS)
LOW DROPOUT TYPE VOLTAGE REGULATOR
1
INPUT GND OUTPUT
( 1 ) ( 2 ) ( 3 )
7-12
12 13
A0 I/O0
11 14
A1 I/O1
10 15
A2 I/O2
IN 9 17
I/O3
A3
8 18
A4 I/O4
IN 7 19
A5 I/O5
6 20
A6 I/O6
IN 5 21
A7 I/O7
27
A8
IN
26
A9
23
A10
IN
25
A11
4
A12
IN
28
A13
3
A14
IN 31
A15
2
A16
IN
29
WE
IN 24
OE
22
CS1
IN
30
CS2
INPUTS
I/O
WE CS1 CS2 OE
x 1 x x HI-Z
0
x x x HI-Z
1 0 1 1 HI-Z OUTPUTS DISABLED
1 0 1 0 DATA OUT
0 0 1 x DATA IN WRITE DATA
1 : HIGH LEVEL
0 : LOW LEVEL
x : DON'T CARE
HI-Z : HIGH IMPEDANCE
1,048,576-BIT
MEMORY ARRAY
8
I/O CONTROLLER
3
INPUT OUTPUT
GND
2
IDT71V256SA15Y (IDT)SOJ
C-MOS 256 K (32 K x 8)-BIT SRAM
—TOP VIEW—
A14 1
IN
A12 2
IN
A7 3
IN
A6 4
IN
A5 5
IN
A4 6
IN
A3 7
IN
A2 8
IN
A1 9
IN
A0 10
IN
I/O1 11
I/O2 12
I/O3 13
FUNCTION
14 GND
STANDBY
STANDBY
READ DATA
CS OE WE OUTPUTS
1 x x HI-Z
0 1 1 HI-Z
0 0 1 D
OUT
0 0 D
x
IN
10
A0
9
A1
8
A2
7
A3
6
BUFFER
A4
5
A5
4
A6
3
A7
25
A8
24
A9
21
A10
23
A11
BUFFER
2
A12
26
A13
1
A14
20
CS
CONTROL
22
OE
CIRCUIT
27
WE
LM1881M (NS)
LM1881MX
VIDEO SYNC SEPARATOR
—TOP VIEW—
COMPOSITE
1
SYNC
OUT
COMPOSITE
2
VIDEO
IN
VERTICAL
3
SYNC
OUT
4 GND
TIMING CHART
COMPOSITE
VIDEO IN
COMPOSITE
SYNC OUT
VERTICAL
SYNC OUT
BURST OUT
ODD/EVEN OUT
10 11
A0 I/O1
V 28
DD 9 12
A1 I/O2
8 13
A2 I/O3
WE
27
IN 7 15
A3 I/O4
6 16
A4 I/O5
26 A13
IN
5 17
A5 I/O6
4 18
A6 I/O7
25 A8
IN
3 19
A7 I/O8
25
A8
24 A9
IN
24
A9
21
A10
23 A11
IN
23
A11
2
A12
OE
22
IN 26
A13
1
A14
21 A10
IN
CS WE OE
20 27 22
CS
20
IN
INPUT
19 I/O8
A0 - A14 : ADDRESS
CS
: CHIP SELECT
18 I/O7
OE
: OUTPUT ENABLE
WE
: WRITE ENABLE
17 I/O6
INPUT/OUTPUT
16 I/O5
I/O1 - 1/O8 : DATA
15 I/O4
FUNCTION
NO SELECTION
0 : LOW LEVEL
OUTPUT DISABLE
1 : HIGH LEVEL
READ
x : DON'T CARE
WRITE
HI-Z : HIGH IMPEDANCE
512 x 512
ROW
MEMORY
DECODER
ARRAY
COLUMN
I/O
I/O
INPUT
BUFFER
DATA
COLUMN
CIRCUIT
DECODER
V 8
CC COMPOSITE
2
VIDEO
7 ODD/EVEN
OUT
6 RSET
BURST/BACK
5
6
OUT
RSET
11
I/O1
12
I/O2
13
I/O3
15
I/O4
16
I/O5
17
I/O6
18
I/O7
19
I/O8
1
COMPOSITE
SYNC
VERTICAL 3
SYNC
7
ODD/EVEN
5
BURST/BACK
HSR-1/1P
HSR-2/2P