SERVICE MANUAL
Document No
Date of Origin
Date of REV
51-L-DSR004
98-10-21
PAGE REV.
0
PAGE
65 /102
S-00-005(96.03.27)
REV.1
10-6.
MODEM
chi p s e t
10-7.
Tel e p h o n e line driver
U300
R6741-28
HINT
12
HD0/DSR
13
HD1/CTS
14
HD2/RLSD
15
HD3/DRSD
16
HD4/AA
17
HD5/RI
18
HD6/TM
19
HD7/RDL
20
D0
54
D1
55
MUTE/CXLI
1
D2
57
D3
58
D4
60
D5
65
D6
66
D7
67
A0
70
A1
71
A2
72
A3
73
A4
74
A5
75
A6
76
A7
77
A8
78
A9
79
A10
80
A11
81
A12
3
A13
4
A14
5
A15
6
A16
9
READ
46
WRITE
47
RAMSEL
11
ROMSEL
10
MIC_M
33
MIC_V
32
SPK_V/SPK_M
27
TELIN/PE3
25
TELOUT/PE2
26
LCS
48
RINGD
53
VOICE
8
OH
7
SVDRES/CKTTL0
2
XTLI
63
XTLO
64
RESP
45
HCS/DTR
22
HRD/RTS
42
HWT/AL
41
NVMDATA
49
NVMCLK
52
HA0/DTRI
21
HA1/RXD
51
HA2/TXD
43
RIN
34
TXA1
28
TXA2
29
CALLID
VREF
30
VC
31
IAVDD2
36
IAGND3
39
IAGND2
35
IAGND1
24
VDD1
83
VDD2
50
VDD3
37
GND1
40
GND2
44
GND3
56
GND4
59
GND5/DSVD_IRQ
62
GND7
84
GND8/DSVD_CS
82
GND6/PLLGND
69
VDD5/PLLCAP
68
VDD4/PLLVDD
61
IAVDD1
23
MH88435-P