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5-1. BLOCK DIAGRAMS (5)
(DTE RXD)
(DTE TXD)
(DTE DTR)
(DTE DCD)
(OFF-HOOK)/RESET
(DTE RTS)
(DTE CTSI)
MODEM TDO
L
(
)
MODEM
CN1004
(DTE RING)
6
7
8
9
CN1000
TELEPHONE
JACK
TO
TELEPHONE
LINE
4
TIP
2
AI SERIAL TIP
1
BI
T100
(MODEM TRSTB)
1
3
CN1002
IC1006
DSP FOR MODEM
AM (0)
109
110
108
107
106
105
100
C (0)
103
C (1)
102
C (2)
104
C (3)
101
C (4)
96
J (0)
J (1)
J (2)
J (3)
J (4)
90
91
98
97
88
74
87
73
67
29
48
50
31
36
34
71
47
AM (1)
111
AM (2)
113
AM (3)
114
AM (4)
115
AM (5)
116
AM (6)
117
AM (7)
118
AM (8)
119
AM (9)
120
AM (10)
121
AM (11)
122
AM (12)
123
AM (13)
124
AM (14)
125
AM (15)
126
AM (16)
127
AM (17)
128
AM (18)
1
DM (0)
5
DM (1)
6
DM (2)
7
DM (3)
8
DM (4)
9
DM (5)
10
DM (6)
11
DM (7)
12
DM (8)
13
DM (9)
14
DM (10)
17
DM (11)
18
DM (12)
19
22
DM (15)
21
DM (14)
20
DM (13)
IC1005
SRAM, PROGRAM CODE
RUNS FROM THIS AREA
AM (0)
DM (8)
27
AM (1)
AM (2)
AM (3)
AM (4)
AM (5)
AM (6)
AM (7)
AM (8)
AM (9)
AM (10)
AM (11)
AM (12)
10
A 0
(WE)
22
9
A 1
(OE)
20
8
A 2
(CS)
11
7
A 3
D 0
DM (9)
12
6
A 4
D 1
DM (10)
13
5
A 5
D 2
DM (11)
15
4
A 6
D 3
DM (12)
16
3
A 7
D 4
DM (13)
17
25
A 8
D 5
DM (14)
18
24
A 9
D 6
DM (15)
19
21
A 10
D 7
23
A 11
2
A 12
26
1
IC1001
CODEC, TALK TO DSP AND
TELECOMM SIDE
C (0)
C (1)
C (2)
C (3)
C (4)
34
D 0
26
35
SADD
OAON
36
IOCK
17
41
D 1
IAIPH
43
SVNC
IC1004
SRAM, PROGRAM CODE IS
HELD IN THIS IC
AM (0)
DM (8)
27
AM (1)
AM (2)
AM (3)
AM (4)
AM (5)
AM (6)
AM (7)
AM (8)
AM (9)
AM (10)
AM (11)
AM (12)
A 13
A 14
10
A 0
(WE)
22
9
A 1
(OE)
20
8
A 2
(CS)
11
7
A 3
D 0
DM (9)
12
6
A 4
D 1
DM (10)
13
5
A 5
D 2
DM (11)
15
4
A 6
D 3
DM (12)
16
3
A 7
D 4
DM (13)
17
25
A 8
D 5
DM (14)
18
24
A 9
D 6
DM (15)
19
21
A 10
D 7
23
A 11
2
A 12
26
AM (13)
1
AM (14)
IC1009
FLASH, FIRMWARE FOR
MODEM
AM (0)
DM (0)
28
AM (1)
AM (2)
AM (3)
AM (4)
AM (5)
AM (6)
AM (7)
AM (8)
AM (9)
AM (10)
AM (11)
AM (12)
AM (13)
45
A 0
(OE)
26
25
A 1
(CS)
11
24
A 2
(W)
29
23
A 3
DQ 0
DM (1)
31
22
A 4
DQ 1
DM (2)
33
21
A 5
DQ 2
DM (3)
35
20
A 6
DQ 3
DM (4)
38
19
A 7
DQ 4
DM (5)
40
18
A 8
DQ 5
DM (6)
42
8
A 9
DQ 6
DM (7)
44
7
A 10
DQ 7
6
A 11
5
A 12
4
A 13
A 16
A 17
48
AM (17)
17
AM (18)
A 14
A 15
2
AM (15)
1
AM (16)
DQ 15-1
AM (14)
3
MODEM R/(W)
CS IC1005
CS IC1004
MODEM TDI
4
MODEM TCK
6
MODEM TMS
7
MODEM R/(W)
8
J (0)
J (1)
J (2)
J (3)
J (4)
SWITCH Q1006
4
3
6
1
IS0105
PHOTO-COUPLER
3
E
4
2
LED OUT
C
-
+
D1005
2
LED OUT
1
4
LED C
LED IN
4
C
3
2
LED OUT
E
IS0101
PHOTO-COUPLER
IS0100
PHOTO-COUPLER
OPTION: ON-HOOK
PARALLEL PHONE
CHECK
IN USE SENSE
IN USE CHECK
BR
ID
G
E
-
BR
ID
G
E
+
1
LED OUT
4
2
LED OUT
C
IS0104
PHOTO-COUPLER
RING 5VM
OPTION: RING
DETECT
2
3
4
5
AM (13)
AM (14)
A13
A14
TELEPHONE
LINES
MODEM
SURGE
ARRESTER
Q1000