Epson Perfection 1270 - Page 43

EPSON Perfection 1670 Photo/Perfection 1270 Revision B
APPENDIX Circuit Diagrams 43
Main6/6
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
Reserve For HW SET
5450U:
R19 ~ R24,R39,R40,R41,R42 UNUSED
R25 ~ R38 USED
UNUSED
UNUSED
For SDRAM 1M * 16Bit
For EMI Experiment
NO POP For EMI Experiment
UNUSED
DMA9 DMA10DMA7 DMA11DMA5DMA2DMA1 DMA12DMA4 DMA13DMA0 DMA3 DMA6 DMA8
DMD13
DMD14
DMD15
DMA1
DMD8
DMA[8:0]DMD[15:0]
DMA0
DMA3
DMA2
DMA4
DMA5
DMA6
DMA7
DMA8
DMD9 DMA9
DMD0
DMD10 DMA10
DMA11
DMD1
DMD2
DMD3
DMD11
DMD4
DMD5
DMD6
DMD7
DMD12 DMA12
DMA13
DRMRASJ
DRMLDQM
DRMUDQM
DRMWEJ
DRMCASJ
DMA[8:0]
DRMCLK
DMD[15:0]
DMA9
DMA10
DMA11
DMA12
DMA13
VCC
VCC
RN5 33
1
2
3
4
8
7
6
5
R35
10K
R31
10K
C51
0.01U M
C45
15pF/50V
U3
V54C316162V TSOP-II
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
VCC
DQ0
DQ1
VSSQ
DQ2
DQ3
VCCQ
DQ4
DQ5
VSSQ
DQ6
DQ7
VCCQ
LDQN
/WE
/CAS
/RAS
/CS
BA
A10
A0
A1
A2
A3
VCC
VSS
A4
A5
A6
A7
A8
A9
NC
CKE
CLK
UDQM
NC
VCCQ
DQ8
DQ9
VSSQ
DQ10
DQ11
VCCQ
DQ12
DQ13
VSSQ
DQ14
DQ15
VSS
R36
10K
R32
10K
C49
0.01U M
C53
0.01U M
C46
15pF/50V
RN6 33
1
2
3
4
8
7
6
5
R27
10K
R23
10K
C54
0.01U M
R37
10K
C47
15pF/50V
R33
10K
C55
0.01U M
C73
10U Z
RN7 33
1
2
3
4
8
7
6
5
R24
10K
C48
15pF/50V
C52
0.01U M
R43
0
R28
10K
R38
10K
R34
10K
L5 Z1000/0.3A
R25
10K
RN8 33
1
2
3
4
8
7
6
5
R29
10K
L6 Z1000/0.3A
C50
0.01U M
R22
10K
R30
10K
R13
10K
R26
10K