Panasonic KX-FT21BX Service Manual page 139

38
VSS
39
IOP92
40
IOP93
41
IOP94
42
IOP95
43
3.3V
44
FMEMCS/IOP27
45
FMEMDO/IOP26
46
FMEMDI/IOP25
47
FMEMCLK/IOP24
48
CBUSY2
49
CSO/OP70
50
CBUSY1
51
CCLK
52
CSI
53
MIDAT/IOP45
54
MICLK/IOP46
55
MILAT/IOP47
56
RVN
57
CPC
58
TONE1
59
TONE2
60
VSS
61
3.3V
62
EVOLIN
63
EVOLOUT
64
EVOLREF
65
VSS
66
IOP57
67
XMDMINT
68
XINTMDM
69
XNMI/XINT
70
EYECKO
71
APDMDT
72
C3
73
C4
74
C5
75
MULT3/5
76
DPDMDT
77
DPDMCK
78
MUTE
79
XEYESYC
80
EYEDAT
81
XRESETD
82
CPUCK
83
XHOLDAK
84
XWAIT/IP60
85
XHOLD/IP61
86
XHSTRD/IOP40
87
VSS
88
XINMDM
89
XOUTMDM
90
TEST1
91
TEST2
92
XTEST
93
TEST3
94
XOUT
95
XIN
96
VSS
97
3.3V
98
TEST4
99
XHSTWR/IOP41
YES
3.3V
YES
3.3V
YES
3.3V
YES
3.3V
YES
3.3V
YES
3.3V
YES
3.3V
YES
3.3V
-
3.3V
-
3.3V
YES
3.3V
YES
3.3V
YES
3.3V
YES
MULT3/5
YES MOMRXENB
MULT3/5
YES
MULT3/5
YES
3.3V
YES
3.3V
-
3.3V
-
3.3V
-
(3.3V)
-
(3.3V)
-
(3.3V)
YES
3.3V
YES
3.3V
-
3.3V
YES
3.3V
NO
MULT3/5
YES
3.3V
NO
MULT3/5
NO
MULT3/5
NO
MULT3/5
NO
MULT3/5
NO
MULT3/5
NO
MULT3/5
NO
MULT3/5
NO
MULT3/5
NO
MULT3/5
-
3.3V
-
3.3V
YES
3.3V
YES PULL DOWN
3.3V
YES
3.3V
NO
3.3V
-
3.3V
NO
3.3V
NO
3.3V
-
3.3V
NO
3.3V
-
3.3V
NO
3.3V
NO
3.3V
YES
3.3V
DG
Ground
OPEN O Not used
OPEN O Not used
OPEN O Not used
OPEN O Not used
+3.3V
Pow er supply
OPEN O Not used
I
Not used
O Not used
TELRXENB I/O Telephone RX root control
OPEN
Not used
OPEN
Not used
OPEN
Not used
OPEN
Not used
OPEN
Not used
MTXENB O Modem TX route control
O Modem RX route control
H/SRXENB O Handset RX route control
BELL
Bell signal detection
PAPER
Recording paper detection
TONE1
Not used
TONE2
Tone2 (bell, alarm, key tone)
DG
Ground
+3.3V
Pow er supply
EVOL IN
Electronic volume (handset, monitor)
EVOL OUT
Electronic volume (handset, monitor)
EVOL REF
Electronic volume (handset, monitor)
DG
Ground
EX-HOOK O Not used
XINTMDM
Modem interrupt
XMDMINT
Modem INT output/general output
XNMI
NMI
EYECKO
Modem AFE connection (APDMCK)
APDMDT
Modem AFE connection
C3
Modem AFE connection
C4
Modem AFE connection
C5
Modem AFE connection
+5V
Pow er supply
DPDMDT
Modem AFE connection
DPDMCK
Modem AFE connection
MUTE
Modem AFE connection
XEYESYC
Modem eye pattern EYESYNC
EYEDAT
Modem eye pattern EYEDAT
XRESETD
Modem AFE connection
CPUCK
CPU clock (6MHz) output
OPEN
Not used
HOOK
Hook detection
Not used
H/S MUTE O Handset TX mute
DG
Ground
20.736MHz crystal oscillator buffer
20.736MHz crystal oscillator buffer
+3.3V
Test pin. fixed High
+3.3V
Test pin. fixed High
XTEST
24MHz clock output
+3.3V
Test pin. fixed High
XOUT 24MHz oscillator
XIN 24MHz oscillator
DG
Ground
+3.3V
Pow er supply
+3.3V
Test pin. fixed High
RLY O Tel line relay control
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KX-FT21LA