Roland Edirol StudioCanvas SD-80 - Circuit Diagram (Main Board 4;7)

May.2002 SD-80
CIRCUIT DIAGRAM (MAIN BOARD 4/7)
fig.mb-sch4
USB Block
INTER FACE
Block
NOTE : "NIU" means "Not In Use."
LEVEL_CONV.
Block
INTER FACE
Block
CPU
Block
LEVEL_CONV.
Block
XS0
XRD
XWR
OBF
XS1
A1
IBF
D0
D3
D1
D4
D5
D2
D7
D6
D8
D9
D10
D11
D12
D13
D14
D15
A2
A3
A4
A5
A7
A6
A8
XPULLUP
CNVSS
CNVSS
XPULLUP
+
5D
D
D
D
+
5D
D
D
D
D
D
+
5D
D
+
5D
+
5D
D
D
D
D
D D
+
5D
D
+
5D
R29
33
(D)
C93
0.1u
C90
0.1u
C97
NIU
R27
1k
C96
NIU
C91
0.1u
C94
680P
R35
0
R30
33
(D)
C102
15p
X1
24.000MHz
1 4
C95
NIU
C100
NIU
RA29
10k
1
2
3
4
5
6
7
8 9
10
11
12
13
14
15
16
C92
0.1u
(K)
R33
0
R28
1M
C98
2.2u/50V
IC17
M37641M8-137FP
R02902867
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
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
P61/DQ1
P60/DQ0
P57/W(R/W)
P56/R (E )
P55/A0
P54/S 0
P53/IBF 0
P52/OBF0
CNVSS
RESET
P51/TOUT/XCOUT
P50/XCIN
VSS
XIN
XOUT
VC
C
AVC C
LPF
AVS S
P44/CNTR1
P43/CNTR0
P42/INT1
P41/INT0
P40/E DMA
P87/R TS 1
P86/C TS 1
P85/URXD1
P84/UTXD1
P83/STXD/RTS2
P82/S RXD/CTS2
P81/S CLK/UR XD2
P80/S RDY/UTXD2
P37/RD
P36/WR
P35/S YNCOUT
P34/PHAIOUT
P33/DMAOUT
P32
P31
P30/R DY
P17/AB15
P16/AB14
P15/AB13
P14/AB12
P13/AB11
P12/AB10
P11/AB9
P10/AB8
P07/AB7
P06/AB6
P05/AB5
P04/AB4
P03/AB3
P02/AB2
P01/AB1
P00/AB0
P27/DB7
P26/DB6
P25/DB5
P24/DB4
P23/DB3
P22/DB2
P21/DB1
P20/DB0
P74/OBF1
P73/IBF1/HLDA
P72/S 1
P71/HOLD
P70/S OF
USB D+
USB D-
XCVRPOWER/EXTC
VSS
VCC
P67/DQ7
P66/DQ6
P65/DQ5
P64/DQ4
P63/DQ3
P62/DQ2
C89
10u/16V
R 36 330
C5
NIU
OS-CON
R31
1.5k
SW2B
SSSS222-01-A
NIU
22
21
23
C99
0.1u
R88
100k
R101
100k
R100
NIU
SW2A
SSSS222-01-A
NIU
12
11
13
R95
0
R34
10k
R102
NIU
RA52
10k
1
2
3
4
5
6
7
8 9
10
11
12
13
14
15
16
Q7
SSM3J02T
1
32
R116
100k
R115
100k
Q11
2SC3052
1
2 3
C101
15p
XRST
USBDP
USBDN
12MHZ
XS0
XS1
A[1..8]
D[0..15]
XRSTCPU
XRD
XWR
IBF
OBF
VBUS
2827