Denon AVR-2809CI Service Manual page 84

IS42S32200E (DI : IC903)
Functional Block Diagram
CLK
CKE
C S COMMAND
R AS DECODER
C AS &
WE CLOCK
GENERATOR
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
ROW
BA0
ADDRESS
BA1
LATCH
10
BURST COUNTER
ADDRESS BUFFER
VCC 1
I/O0 2
VCCQ 3
I/O1 4
I/O2 5
GNDQ 6
I/O3 7
I/O4 8
VCCQ 9
I/O5 10
I/O6 11
GNDQ 12
I/O7 13
NC 14
VCC 15
DQM0 16
WE 17
C AS 18
R AS 19
C S 20
NC 21
BA0 22
BA1 23
A10/AP 24
A0 25
A1 26
A2 27
DQM2 28
VCC 29
NC 30
I/O16 31
GNDQ 32
I/O17 33
I/O18 34
VCCQ 35
I/O19 36
I/O20 37
GNDQ 38
I/O21 39
I/O22 40
VCCQ 41
I/O23 42
VCC 43
REFRESH
MODE
CONTROLLER
REGISTER
10
CONTROLLER
REFRESH
COUNTER
10
COLUMN
ADDRESS LATCH
COLUMN
AVR-2809CI / AVR-2809 / AVR-989 / AVC-2809
86
85
84
83
82
81
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
SELF
REFRESH
10
ROW
ADDRESS
BUFFER
BANK CONTROL LOGIC
84
GND
I/O15
GNDQ
I/O14
I/O13
VCCQ
I/O12
I/O11
GNDQ
I/O10
I/O9
VCCQ
I/O8
NC
GND
DQM1
NC
NC
CLK
CKE
A9
A8
A7
A6
A5
A4
A3
DQM3
GND
NC
I/O31
VCCQ
I/O30
I/O29
GNDQ
I/O28
I/O27
VCCQ
I/O26
I/O25
GNDQ
I/O24
GND
DQM0-3
DATA IN
BUFFER
32 32
I/O 0-31
Vcc/Vcc
DATA OUT
GND/GNDQ
BUFFER
32 32
2048
2048
MEMORY CELL
2048
ARRAY
2048
BANK 0
SENSE AMP I/O GATE
256
(x 32)
COLUMN DECODER
Q