Panasonic KX-FT901CX-B Service Manual page 108

KX-FT901CX-B / KX-FT903CX-B / KX-FT901CX-W / KX-FT903CX-W / KX-FT901CX-S / KX-FT903CX-S
NO.
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
60 XMDMINT
61 XMDMCS
62 XRAS/IOP
63 XCAS1/IOP
64 XCAS2/IOP
65 XRESCS2
66 DB3
67 DB2
68 DB4
69 DB1
70 DB5
71 VDD (3.3V)
72 VSS
73 VSS
74 VDD (3.3V)
75 DB0
76 DB6
77 DB7
78 XROMCS
79 RD
80 WR
81 ADR0
82 ADR1
83 ADR2
84 ADR3
85 ADR4
86 ADR5
87 VSS
88 VDD (2.5V)
89 ADR6
90 ADR7
91 ADR8
92 ADR9
93 ADR10
94 ADR11
SIGNAL I/O
A
A
A
A
I
O
I/O
O
I/O
O
I
I
I/O
O
O
O
O
O
I
O
I
I
I
I
I
O
I/O
I
I
O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
POWER SUPPLIED
VOLTAGE
3.3V TONE OUTPUT
3.3V ANALOG REF VOLTAGE
3.3V VOLUME OUTPUT
3.3V VOLUME INPUT
3.3V HIGH FIXED
3.3V OUTPUT PORT (CIS ON)
----- POWER SOURCE (+3.3V)
GND POWER SOURCE (GND)
GND POWER SOURCE (GND)
----- POWER SOURCE (+3.3V)
3.3V PORT (TONE1EN)
3.3V OUTPUT PORT (TONE2EN)
3.3V PORT (HSRXEN)
3.3V OUTPUT PORT (DATA)
3.3V INPUT PORT (HOOK)
3.3V INPUT PORT (TEST)
3.3V PORT (CD)
3.3V OPEN
3.3V CPU ADDRESS BUS 15 (NOT USED)
3.3V CPU ADDRESS BUS 14 (NOT USED)
3.3V CPU ADDRESS BUS 13 (NOT USED)
----- POWER SOURCE (+2.5V)
3.3V SYSTEM CLOCK (24MHz)
3.3V SYSTEM CLOCK (24MHz)
GND POWER SOURCE (GND)
----- POWER SOURCE (+3.3V)
3.3V 24MHz CLOCK
3.3V HIGH FIXED
3.3V HIGH FIXED
3.3V HIGH FIXED
3.3V HIGH FIXED
3.3V MODEM INTERRUPT
3.3V MODEM CHIP SELECT
3.3V PORT (SPMUTE)
3.3V INPUT PORT (PAPER)
3.3V INPUT PORT (PDWN)
3.3V FLASH CHIP SELECT (XRESCS2)
3.3V CPU DATA BUS 3
3.3V CPU DATA BUS 2
3.3V CPU DATA BUS 4
3.3V CPU DATA BUS 1
3.3V CPU DATA BUS 5
----- POWER SOURCE (+3.3V)
GND POWER SOURCE (GND)
GND POWER SOURCE (GND)
----- POWER SOURCE (+3.3V)
3.3V CPU DATA BUS 0
3.3V CPU DATA BUS 6
3.3V CPU DATA BUS 7
3.3V ROM (IC502) CHIP SELECT
3.3V CPU RD
3.3V CPU WR
3.3V CPU ADDRESS BUS 0
3.3V CPU ADDRESS BUS 1
3.3V CPU ADDRESS BUS 2
3.3V CPU ADDRESS BUS 3
3.3V CPU ADDRESS BUS 4
3.3V CPU ADDRESS BUS 5
GND POWER SOURCE (GND)
----- POWER SOURCE (+2.5V)
3.3V CPU ADDRESS BUS 6
3.3V CPU ADDRESS BUS 7
3.3V CPU ADDRESS BUS 8
3.3V CPU ADDRESS 9
3.3V CPU ADDRESS 10
3.3V CPU ADDRESS 11
108
DESCRIPTION