Panasonic KX-FP342CX Service Manual page 154

NO. SIGNAL
19 CPC
20 RVN
21 IRDATXD/IOP
22 IRDARXD/IOP80
23 TXD/IOP
24 RXD/IOP
25 XRTS/IOP
26 XCTS/IOP
27 VDD (2.5V)
28 TONE1
29 TONE2
30 VOLUREF
31 VOLUOUT
32 VOLUIN
33 XNMI
34 FMEMDO/IOP
35 VDD (3.3V)
36 VSS
37 VSS
38 VDD (3.3V)
39 MIDAT/IOP
40 MICLK/IOP
41 MILAT/IOP
42 20KOSC/IOP
43 XWAIT
44 HSTRD/IOP
45 HSTWR/IOP
46 XOPRBE
47 ADR15
48 ADR14
49 ADR13
50 VDD (2.5V)
51 XOUT
52 XIN
53 VSS
54 VDD (3.3V)
55 XTEST
56 TEST1
57 TEST2
58 TEST3
59 TEST4
I/O POWER
SUPPLIED
VOLTAGE
I 3.3V
I 3.3V
O 3.3V
I 3.3V
I 3.3V
O 3.3V
I 3.3V
O 3.3V
3.3V
A 3.3V
A 3.3V
A 3.3V
A 3.3V
A 3.3V
I 3.3V
O 3.3V
-----
GND
GND
-----
O 3.3V
O 3.3V
O 3.3V
I 3.3V
I 3.3V
O 3.3V
O 3.3V
O 3.3V
O 3.3V
O 3.3V
O 3.3V
-----
O 3.3V
I 3.3V
GND
-----
O 3.3V
I 3.3V
I 3.3V
I 3.3V
I 3.3V
154
DESCRIPTION
INPUT PORT (PTOP)
INPUT PORT (REED)
OUTPUT PORT (CISLED)
INPUT PORT (DSR)
INPUT PORT (TXD)
OUTPUT PORT (SENLED1)
INPUT PORT (HOOK)
OUTPUT PORT (SPMUTE)
POWER SOURCE (+2.5V)
TONE OUTPUT
TONE OUTPUT
ANALOG REF VOLTAGE
VOLUME OUTPUT
VOLUME INPUT
HIGH FIXED
OUTPUT PORT (ON-MREN)
POWER SOURCE (+3.3V)
POWER SOURCE (GND)
POWER SOURCE (GND)
POWER SOURCE (+3.3V)
OUTPUT PORT (TONE1EN)
OUTPUT PORT (CISON)
OUTPUT PORT (OPERESET)
INPUT PORT (BELL)
INPUT PORT (KOVER)
NOT USED
NOT USED
MFCS
CPU ADDRESS BUS 15 (NOT USED)
CPU ADDRESS BUS 14 (NOT USED)
CPU ADDRESS BUS 13 (NOT USED)
POWER SOURCE (+2.5V)
SYSTEM CLOCK (24MHz)
SYSTEM CLOCK (24MHz)
POWER SOURCE (GND)
POWER SOURCE (+3.3V)
24MHz CLOCK
HIGH FIXED
HIGH FIXED
HIGH FIXED
HIGH FIXED