Panasonic KX-FT21RS User Manual
Page 102
Pin
Pin Name
Buffer Power supply
5V Tolerant
Signal Name
I/O
Description
26
IRDATXD/IOP81
3.3V
YES
OPEN
O Not used
27
IRDARXD/IOP80
3.3V
YES
OPEN
O Not used
28
TXD/IOP30
3.3V
YES
BREAK
O TEL Line Break Control
29
RXD/IOP31
3.3V
YES
H/S ALC
I
Not used (Hardware Control)
30
XRTS/IOP32
3.3V
YES
DTMF IMP
O DTMF-IMP Control
31
XCTS/IOP33
3.3V
YES
P-SHORT
O P-SHORT Control
32
XDSR/IOP34
3.3V
YES
OPEN
O Not used
33
DCD/IOP35
3.3V
YES
OPEN
O Not used
34
XDTR/IOP36
3.3V
YES
OPEN
O Not used
35
RI/CLK/IOP37
3.3V
YES
OPEN
O Not used
36
IOP90
3.3V
YES
OPEN
O Not used
37
IOP91
3.3V
YES
OPEN
O Not used
38
VSS
DG
Ground
39
IOP92
3.3V
YES
OPEN
O Not used
40
IOP93
3.3V
YES
OPEN
O Not used
41
IOP94
3.3V
YES
OPEN
O Not used
42
IOP95
3.3V
YES
OPEN
O Not used
43
3.3V
+3.3V
Power supply
44
FMEMCS/IOP27
3.3V
YES
OPEN
O Not used
45
FMEMDO/IOP26
3.3V
YES
I
Not used
46
FMEMDI/IOP25
3.3V
YES
O Not used
47
FMEMCLK/IOP24
3.3V
YES
TELRXENB
I/O Telephone RX root control
48
CBUSY2
3.3V
-
OPEN
Not used
49
CSO/OP70
3.3V
-
OPEN
Not used
50
CBUSY1
3.3V
YES
OPEN
Not used
51
CCLK
3.3V
YES
OPEN
Not used
52
CSI
3.3V
YES
OPEN
Not used
53
MIDAT/IOP45
MULT3/5
YES
MTXENB
O Modem TX route control
54
MICLK/IOP46
MULT3/5
YES
MOMRXENB
O Modem RX route control
55
MILAT/IOP47
MULT3/5
YES
H/SRXENB
O Handset RX route control
56
RVN
3.3V
YES
BELL
Bell signal detection
57
CPC
3.3V
YES
PAPER
Recording paper detection
58
TONE1
3.3V
-
TONE1
Not used
59
TONE2
3.3V
-
TONE2
Tone2 (bell alarm key tone)
60
VSS
DG
Ground
61
3.3V
+3.3V
Power supply
62
EVOLIN
(3.3V)
-
EVOL IN
Electronic volume (handset monitor)
63
EVOLOUT
(3.3V)
-
EVOL OUT
Electronic volume (handset monitor)
64
EVOLREF
(3.3V)
-
EVOL REF
Electronic volume (handset monitor)
65
VSS
DG
Ground
66
IOP57
3.3V
YES
EX-HOOK
O Not used
67
XMDMINT
3.3V
YES
XINTMDM
Modem interrupt
68
XINTMDM
3.3V
-
XMDMINT
Modem INT output/general output
69
XNMI/XINT
3.3V
YES
XNMI
NMI
70
EYECKO
MULT3/5
NO
EYECKO
Modem AFE connection (APDMCK)
71
APDMDT
3.3V
YES
APDMDT
Modem AFE connection
72
C3
MULT3/5
NO
C3
Modem AFE connection
73
C4
MULT3/5
NO
C4
Modem AFE connection
74
C5
MULT3/5
NO
C5
Modem AFE connection
75
MULT3/5
+5V
Power supply
76
DPDMDT
MULT3/5
NO
DPDMDT
Modem AFE connection
77
DPDMCK
MULT3/5
NO
DPDMCK
Modem AFE connection
78
MUTE
MULT3/5
NO
MUTE
Modem AFE connection
79
XEYESYC
MULT3/5
NO
XEYESYC
Modem eye pattern EYESYNC
80
EYEDAT
MULT3/5
NO
EYEDAT
Modem eye pattern EYEDAT
81
XRESETD
MULT3/5
NO
XRESETD
Modem AFE connection
82
CPUCK
3.3V
-
CPUCK
CPU clock (6MHz) output
83
XHOLDAK
3.3V
-
OPEN
Not used
84
XWAIT/IP60
3.3V
YES
HOOK
Hook detection
85
XHOLD/IP61
3.3V
YES
PULL DOWN
Not used
86
XHSTRD/IOP40
3.3V
YES
H/S MUTE
O Handset TX mute
87
VSS
DG
Ground
88
XINMDM
3.3V
NO
20.736MHz crystal oscillator buffer
89
XOUTMDM
3.3V
-
20.736MHz crystal oscillator buffer
90
TEST1
3.3V
NO
+3.3V
Test pin. fixed High
91
TEST2
3.3V
NO
+3.3V
Test pin. fixed High
92
XTEST
3.3V
-
XTEST
24MHz clock output
102
KX-FT21RS