Sanyo DCS-AVD8501 Service Manual page 57

IC BLOCK DIAGRAM & DESCRIPTION
IC101 BU4066BCF (Quad Analog Switch)
IC201 T224162B,LC324265AT,M11B416256A (DRAM)
15
WE
CASL
31
30
CASH
NO.2 CLOCK
GENERATOR
COLUMN
ADDRESS
9
BUFFER
A0 18
REFRESH
19
A1
CONTROLLER
A2 20
A3
21
A4
24
REFRESH
A5
25
COUNTER
A6
26
A7 9
27
A8
28
ROW
9 ADDRESS
BUFFER(9)
NO.1 CLOCK
RAS 16
GENERATOR
TSOP44
V V
1 44
CC SS
I/O1 I/O16
2 43
I/O2 I/O15
3 42
I/O3 I/O14
4 41
I/O4 I/O13
5 40
V
V 6 39
CC
I/O5 I/O12
7 38
I/O6 I/O11
8 37
I/O7 I/O10
9 36
I/O8 I/O9
10 35
NC 13 32
NC
NC 14 31 CASL
WE 15 30 CASH
RAS 16 29 OE
NC
17 28 A8
18 27 A7
A0
A1 19 26 A6
A2 20 25 A5
A3 21 24 A4
V
V 22
23 SS
CC
Top view
I / O 1
1
OUT / IN IN / OUT
O / I 2
1
O / I 3
2 OUT / IN IN / OUT
I / O 4
2
IN / OUT OUT / IN
5
C
2
C 6
3
IN / OUT
V 7
ss
CONTROL
DATA-IN BUFFER
LOGIC
COLUMN
9
DECODER
512
SENSE AMPLIFIERS
VO GATING
512x16
512x512x16
512
9
MEMORY
ARRAY
PIN NO. SYM. TYPE
SS
16~19,22~26 A0~A8 Input
14 RAS Input
28 CASH Input
29 CASL Input
13 WE Input
27 OE Input
2~5,6~10,31~34,36~39 I/O1-I/O16 Input/Output
1,6,20 V Supply
CC
21,35,40 V Ground
SS
11,12,15,30 NC -
- 72 -
14 V
DD
SWA
13 C
1
SWD
12 C
4
I / O
11
4
10
SWB O / I
4
9
O / I
SWC
3
OUT / IN
8
I / O
3
2~5
7~10
16
35~38
40~43
DATA-OUT
BUFFER
29
16
8 8
6 V
V
39
DESCRIPTION
Address Input
Row Address Strobe
Column Address Stlobe /Upper Byte Control
Column Address Stlobe /Lower Byte Control
Write Enable
Output Enable
Data Input /Output
Power, 5V
Ground
No Connec
I/O1~I/O4
I/O7~I/O8
I/O9~I/O12
I/O13~I/O16
OE
CC
SS