Sdram - Philips LC4.2E Service Manual

Circuit Diagrams and PWB Layouts
TV & Scaler Board: SDRAM
1 2

SDRAM

FSCLK+
FSCLK-
FSRAS
FSCAS
FSWE
FSCLK+
FSCLK-
FSCKE
FSDQM0
FSDQM1
FSDQM2
FSDQM3
FSBKSEL0
FSBKSEL1
FSADDR0
FSADDR1
FSADDR2
FSADDR3
FSADDR4
FSADDR5
FSADDR6
FSADDR7
FSADDR8
FSADDR9
FSADDR10
FSADDR11
FSDQS
+2V5_DDR
2501 2502 2503 2504 2505 2506
47u 47u 100n 100n 100n 100n
3139 123 5804.2
1 2
LC4.2E AA 7.
3 4
+2V5_DDR
3501
10K
FSVREF
FSVREF
F501
I503
2517
3503 3502
10K
150R
100n
1%
I502
7501
K4D263238M-QC50
VREF
VDD VDDQ
28
CS
SDRAM
27
RAS
26 1M X 32 X 4
CAS
25
WE
55
CK
54
CK
53
CKE
23
0
56
1
24 DM
2
57
3
29
0
30 BA
1
31
0
32
1
33
2
34
3
47
4
48
5
A
49
6
50
7
51
8
45
9
36
10
37
11
38
39
40
41 NC
42
43
93
RFU
52
MCL
VSS VSSQ
2507 2508 2509 2510 2511 2512 2513
100n 100n 100n 100n 100n 100n 100n
3 4
33
5 6
+2V5_DDR
44
87
88
NC 89
90
91
97
0
98
1
100
2
1
3
3
4
4
5
6
6
7
D 7
60
8
61
9
63
10
64
11
68
12
69
13
71
14
72
15
9
16
10
17
12
18
13
19
17
20
18
21
20
22
21
D 23
74
24
75
25
77
26
78
27
80
28
81
29
83
30
84
31
94
DQS
2514 2515
2516
100n 100n 100n
5 6
7 8 9
FSDATA0
FSDATA1
FSDATA2
FSDATA3
FSDATA4
FSDATA5
FSDATA6
FSDATA7
FSDATA8
FSDATA9
FSDATA10
FSDATA11
FSDATA12
FSDATA13
FSDATA14
FSDATA15
FSDATA16
FSDATA17
FSDATA18
FSDATA19
FSDATA20
FSDATA21
FSDATA22
FSDATA23
FSDATA24
FSDATA25
FSDATA26
FSDATA27
FSDATA28
FSDATA29
FSDATA30
FSDATA31
7 8 9
2501 E
2502 E
2503 E
2504 E
2505 E
2506 E
2507 E
2508 E
2509 E
2510 E
2511 E
A 2512 E
2513 E
2514 E
2515 E
2516 E
2517 A
3501 A
3502 A
3503 A
7501 A
F501 A
I502 A3
I503 A3
B
C
D
E
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