Philips DVDR1000/001, Service Manual

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Circuit-, IC Descriptions and List of Abbreviations
GB 267 DVDR1000 /0x1 /691 9.
9.9.10 IC7700: SRAM
CY7C1019V33
Features
• High speed
— t
AA
= 12, 15, 20 ns
• V
CC
= 3.3V ± 10%
• Low active power
— 432 mW (max.)
— 288 mW (L version)
• Low CMOS standby power
— 18 mW (max.)
— 7.2 mW (L version)
• 2.0V Data Retention
• Automatic power-down when deselected
• TTL-compatible inputs and outputs
• Easy memory expansion with CE
1
, CE
2
, and OE options
Functional Description
The CY7C109V33/CY7C1009V33 is a high-performance
CMOS static RAM organized as 131,072 words by 8 bits. Easy
memory expansion is provided by an active LOW chip enable
(CE
1
), an active HIGH chip enable (CE
2
), an active LOW out-
put enable (OE), and three-state drivers. Writing to the device
is accomplished by taking chip enable one (CE
1
) and write
enable (WE) inputs LOW and chip enable two (CE
2
) input
HIGH. Data on the eight I/O pins (I/O
0
through I/O
7
) is then
written into the location specified on the address pins (A
0
through A
16
).
Reading from the device is accomplished by taking chip en-
able one (CE
1
) and output enable (OE) LOW while forcing
write enable (WE) and chip enable two (CE
2
) HIGH. Under
these conditions, the contents of the memory location speci-
fied by the address pins will appear on the I/O pins.
The eight input/output pins (I/O
0
through I/O
7
) are placed in a
high-impedance state when the device is deselected (CE
1
HIGH or CE
2
LOW), the outputs are disabled (OE HIGH), or
during a write operation (CE
1
LOW, CE
2
HIGH, and WE LOW).
The CY7C109V33 is available in standard 32-pin,
400-mil-wide SOJ package. The CY7C1009V33 is available in
a 32-pin, 300-mil-wide SOJ package. The CY7C1009V33 and
CY7C109V33 are functionally equivalent in all other respects.
14 15
Logic Block Diagram
Pin Configurations
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
COLUMN
DECODER
RO
W
DE
CO
DE
R
SE
N
SE A
M
PS
INPUT BUFFER
POWER
DOWN
WE
OE
I/O
0
CE
2
I/O
1
I/O
2
I/O
3
512 x 256 x 8
ARRAY
I/O
7
I/O
6
I/O
5
I/O
4
A
0
A
11
A
13
A
12
A A
10
CE
1
A A
16
A
9
1
2
3
4
5
6
7
8
9
10
11
14
19
20
24
23
22
21
25
28
27
26
Top View
SOJ
12
13
29
32
31
30
16
15
17
18
GND
A
16
A
14
A
12
A
7
A
6
A
5
A
4
A
3
WE
V
CC
A
15
A
13
A
8
A
9
I/O
7
I/O
6
I/O
5
I/O
4
109V33–1
A
2
NC
I/O
0
I/O
1
I/O
2
CE
1
OE
A
10
I/O
3
A
1
A
0
A
11
CE
2
109V33–2
A
6
A
7
A
16
A
14
A
12
WE
V
CC
A
4
A
13
A
8
A
9
OE
TSOP I
Top View
(not to scale)
1
6
2
3
4
5
7
32
27
31
30
29
28
26
21
25
24
23
22
19
20
I/O
2
I/O
1
GND
I/O
7
I/O
4
I/O
5
I/O
6
I/O
0
CE
A
11
A
5
17
18
8
9
10
11
12
13
14
15
16
CE
2
A
15
NC
A
10
I/O
3
A
1
A
0
A
3
A
2
109V33–3