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IC BLOCK DIAGRAMS AND TERMINAL DESCRIPTIONS -45
Q3661:M12L64164A-7TG (64 Mbit Syncronous DRAM)
BLOCK DIAGRAM
CLK
Clock
Generator
CKE
Address
CS
RAS
CAS
WE
PIN CONFIGURATION
V
DD
DQ 0
V
D D Q
DQ 1
DQ 2
V
S S Q
DQ 3
DQ 4
V
D D Q
DQ 5
DQ 6
V
S S Q
DQ 7
V
DD
L DQ M
W E
C AS
R AS
CS
A
13
A
12
A
/AP
10
A
0
A
1
A
2
A
3
V
DD
Row
Address
Buffer
Mode
&
Register
Refresh
Counter
Column
Address
Buffer
&
Refresh
Counter

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1
54
V
SS
2
53
DQ15
3
52
V
S S Q
4
51
DQ14
5
50
DQ13
6
49
V
DD Q
7
48
DQ12
8
47
DQ11
46
V
9
S S Q
10
45
DQ10
11
44
DQ 9
43
V
12
DD Q
42
DQ 8
13
41
V
14
S S
40
N C
15
39
U D Q M
16
38
CLK
17
37
CKE
18
36
N C
19
35
A
20
11
34
A
21
9
33
A
22
8
32
A
23
7
31
A
24
6
30
A
25
5
29
26
A
4
28
27
V
S S
Bank D
Bank C
Bank B
Bank A
Sense Amplifier
Column Decoder
Data Control Circuit
FEATURES
JEDEC standard 3.3V power supply
LVTTL compatible with multiplexed address
Four banks operation
MRS cycle with address key programs
- CAS Latency (2 & 3)
- Burst Length (1, 2, 4, 8 & full page)
- Burst Type (Sequential & Interleave)
All inputs are sampled at the positive going edge
of the system clock
Auto & self refresh
15.6 us refresh interval
TX-SR875
L(U)DQM
DQ

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