UX-B20U/UX-B20C/B25C
6 – 3
3. FAX Modem Block (3/8)
A
A
B
B
C
C
D
D
E
E
F
F
G
G
H
H
I
I
6
6
5
5
4
4
3
3
2
2
1
1
FLTXD
SIGM
UT
E
SIGM
UT
E
D
T
MF
MUTE
D
T
MF
MUTE
CN
L
IU
-5
CNPN-8
CNL
CI-
HS-
RHS-
IU
-1
1
CN
L
IU
-7
CNLIU
-1
5
CNLIU
-1
4
CNLIU
-1
6
CNPR
G
-3
RCV
O
L
PIN
CM
L
CNPN-7
VOLB
W-
T
O
N
E
LED
O
N
FSYNC
MC
L
K
CT
RL
S
IN
DAT
A
I
ICLK
CD
C
R
S
T
CNBKL
BKL1
BKL2
-2
CNPR
G
-1
WA
IT
CNLIU
-1
2
CNLIU
-1
0
CNBKL
-3
SI
G
T
X
DAT
A
O
VOLA
SPOU
T
SPMUTE
MICIN
VOLC
MICMUTE
SIGR
X
ASIC
R
E
S
DG
DG
DG
+3.3V
DG
DG
DG
+3.3V
DG
DG
VR
E
F
DG
ADG
ADG
ADG
ADG
ADG
+24V
ADG
ADG
ADG
+3.3
V
DG
DG
ADG
DG
DG
DG
(7-4D)
(7-2E)
(7-2E)
(7-3D)
(7-3I)
(7-3A)
FLRX
D
SPMUTE
TELMUTE
CML
DPON
DPMUTE
ORGSNS-
FRSNS-
(4-4A)
(7
-2E)
RC
V
O
L
C3
2
0
1000p
F
R1
6
3
R1
7
4
C3
3
0
R2
2
3
C28
6
0
.
1u/50V
C3
5
0
R
2
29
1
10k
R1
2
9
C28
3
10u/10
V
C1
9
6
0.
1
u
K
C2
8
5
10u/10
V
C1
9
0
Q104
B
C
E
R1
8
3
C1
8
9
C2
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
82
Q103
B
C
E
R1
8
6
1K
C2
4
1
0.1uF
C1
5
6
R1
8
4
C
2
8
8
100p
R1
8
8
R
1
6
5
470
C3
3
1
R
1
6
8
270
C3
4
5
0.
1
u
K
+
Ð
IC12A
3
2
1
11
4
R
2
2
2
270
R2
2
R1
6
6
R2
3
1
3.
3
k
R1
8
7
2.2
K
C1
9
7
1000p
F
R1
0
3
C3
4
6
0.
1
u
K
R
1
6
4
270
R
1
6
1
270
R1
4
9
C2
4
2
10u/10 (2012)
(2012)
(2012)
V
R1
8
5
R2
1
5
R
2
0
4
100
C1
9
1
R1
0
8
C2
4
3
0.
1
u
F
C
284
0.
1
u
F
C1
5
4
R21
6
R2
1
7
R1
6
2
R21
8
C19
3
1000p
F
IC5
SCE209L
(2/2)
MODEM
BLOCK
GPIO4
56
GPIO16
52
AVDD
(IIA)
85
GPO28
155
GPIO31
159
GPO27
154
GPO25
68
GPIO34
162
GPO30/SR3OUT
157
GPIO32
160
GPIO17
51
SPKR_OUTP
(IIA)
88
GPO1
168
MIC_INM
(IIA)
81
MIC_INP
(IIA)
80
GPO29
156
MCDE0
91
GPO0
167
LINE_INP
(IIA)
79
N.C.
37
SASRXD
110
GPIO3
109
RDY
66
GPIO11/SERIN/SR4IN
65
GPIO36
164
GPIO35
163
MIC_BIAS
(IIA)
82
TESTC
73
GPIO29
158
GPIO5
105
DSS_PARK
106
SASRXD2
103
LINE_OUTP
(IIA)
87
SASTXD2
104
GPO3
170
GPO2
169
GPIO26
150
GPIO27
151
GPO26
153
GPIO9
112
SOUT
(IIA)
74
POR
(IIA)
77
FSYNC
(IIA)
76
ICLK
(IIA)
92
MCLK
(IIA)
71
CTRLI
(IIA)
72
SIN
(IIA)
75
SA1CLK
102
IA1CLK
98
IACLK
96
SR1IO
101
SR4OUT
100
SR3IN
99
IARESET
95
DVSS(IIA)
93
DVDD
(IIA)
90
SPKR_OUTM
(IIA)
89
AGND
(IIA)
84
VREF
(IIA)
83
AVSS2
(IIA)
78
AVSS1
(IIA)
86
GPIO8
113
GPIO28
152
SASTXD
111
R
1
6
0
270
C1
9
5
1000p
F
R1
8
2
270
C3
4
7
C5
2
L104
15
R
2
0
3
100
R1
6
7
3
3
R2
4
2
R2
0
6
R2
4
0
R2
2
5
10
k
C1
5
5
R2
2
4
11
0
k
C3
2
1
1000p
F
R16
9
1k
R2
2
7
10
k
R
1
7
1
270
C3
1
0.1uF
LM2902NSR
N.M.
N.M.
N.M.
N.M.
N.M.
N.M.
(6-1A)
(7-3E)
(4-3A)
(6-3F)
(7-3I)
(7-3I)
(7-3I)
(4-4H)
(7-6B)
(7-6B)
(7-6B)
(7-6B)
(7-5A)
(7-6B)
(7-6B)
(7-1A)
(7-2E)
F
A
X
Modem
Block
3/8
Summary of Contents for UX-B20
Page 2: ... i UX B20U UX B20C B25C ...