67
KX-TG4771B/KX-TG4772B/KX-TG4773B/KX-TGA470B
KX-TG4771 SCHEMATIC DIAGRAM (Base Unit (Main))
NC: No Components
!
X
R
U
X
T
U
EEP_WP
SPI_C
S
EEP_SD
A
SPI_CL
K
EEP_SC
L
S
C
_
D
C
L
SPI_D
O
SPI_D
I
L
L
E
B
KEYS_
F
K
L
C
_
2
I
P
S
O
D
_
2
I
P
S
D
C
_
D
C
L
KEYS_
A
KEYS_
B
EEP_WP
EEP_SC
L
EEP_SD
A
KEYIN
3
KEYIN
2
KEYIN
1
KEYS_
C
KEYIN
4
KEYIN
5
KEYS_
D
KEYS_
E
KEYIN
6
SPI_CL
K
SPI_D
O
SPI_D
I
SPI_C
S
K
O
O
H
e
s
l
u
p
pulse
pulse_mute
HOOK_DET
HOOK
0
2
1
C
p
0
0
0
1
1
0
1
D
4
3
1
2
4
8
1
C
u
0
.
1
K
L476
NC
1
A
Z
C
N
2
1
6
7
9
1
1
5
4
3
8
0
1
2
1
R131
10M
C
N
R509
V
5
.
5
+
C152
0.01u
1
6
1
R
k
0
0
1
R133
330k
5
7
1
C
p
0
0
0
1
C507
K2.2u
C342
0.1u
C611
0.1u
u
1
.
0
1
0
6
C
0
1
R501
C
D
D
V
C331
NC
R114
47k
u
1
1
2
5
C
C111
0.047u
V
0
.
3
+
3
7
1
C
u
2
2
.
0
K
C513
K2.2u
C512
0.1u
R171
22
C457
0.033
u
T
A
B
V
C172
NC
V
0
.
3
+
1
5
1
R
k
0
0
1
R176
100
C142
K
0.01
u
C509
12p
C124
10p
C151
10p
C132
K0.01u
C
N
C460
R605
3.3k
T
A
B
V
V
0
.
3
+
C167
NC
8
6
4
0
5
A
R
1
2
3
4
R505
2.2k
V
0
.
3
+
A
C
C
V
V
0
.
3
+
R112
100k
R612
10k
C185
NC
R113
10k
C
D
D
V
C514
0.1u
2
7
1
R
k
0
0
1
R165
27k
C522
10p
RA151
1k
1
2
3
4
A
C
C
V
V
0
.
3
+
4
6
1
R
k
7
.
2
L474
NC
C508
10p
C458
0.033
u
R166
NC
C186 10p
C530
10p
4
0
5
C
u
1
R606
3.3k
C123
10p
R111
100k
1
0
1
P
2
2
1
0
5
X
M
4
2
8
.
3
1
F
E
R
V
R506
NC
D
N
G
C
N
C461
R601
NC
C113
K0.68u
6
0
5
C
u
1
P
A
G
C519
0.1u
R175
560
k
0
9
3
2
2
1
R
C112
0.047u
C321
1u
V
5
.
5
+
u
1
.
0
1
0
5
C
C510
K1u
R178
1k
0
2
5
C
u
1
.
0
C164
NC
C
D
D
V
1
L
C
_
K
A
H
R331
68k
C322
NC
D
N
G
SA103
N
C
2
1
IC302
3
IN
2
OUT1
1
J
D
A
4
OUT2
D142
30V
AK
u
0
1
2
0
5
C
C503
10u
u
0
1
C505
C511
10u
C178
0.022u
IC601
FLASH
16M
1
*CS
2
DO/IO1
6
CLK
7
*HOLD/IO3
3
*WP/IO2
8
VCC
4
GND
5
DI/IO0
R332
33k
Q161
B
C
E
RA651
100
1
2
3
4
5
6
7
8
RA652
100
1
2
3
4
5
6
7
8
C900
10p
RCVRn
RCVRp
HANDSETMICp
HANDSETMICn
M
C
D
P
C
D
T
1
L
R
1
L
R925
2.2k
HOOK2-4
R922
100k
R921
3.9k
HOOK2-6
R92
0
10k
R926
47k
HOOK_DET
R919
100k
C930
0.056u
R943
18k
C929
4.7u
C928
u
1
D
N
G
R938 3.3k
R941
18k
V
0
.
3
+
1
0
3
F
A
3
RINGER
+
RINGER
-
R945
2.7k
1
23
4
R946
2.7k
1
23
4
C934
p
0
0
0
1
C918
0.033
u
C919
0.033
u
D
N
G
k
0
9
3
1
2
1
R
R910
10k
R911
k
2
.
2
V
0
.
3
+
C931
0.47u
C343
1u
Q914
R913
560
R912
0
2
2
u
p
a
_
t
a
b
V
u
p
a
_
t
a
b
V
SA102
NC
2
1
Q905
C
N
Q903
Q901
R1012
C
N
R929 3.3k
IC903
0
4
2
1
S
L
1
LINE1
2
GND
3
CSW
4
RA
5
OUT
6
NULL
7
CR
8
LINE2
0
6
1
R
0
2
8
R162
18k
n
0
0
1
5
0
9
L
5
1
0
1
R
0
6
1
0
1
R
NC
C938
NC
C939
NC
C940
0.01u
R939
k
8
.
6
D
N
G
D
N
G
D
N
G
D
N
G
Q913
B
C
E
C306
100u
1
6
C912
100u
16
C924
1000u
6.3
u
0
1
C933
C937
100u
16
C911
NC
R908
4.7k
R1019
2.7k
R909
18k
R1017
k
0
0
1
R1018
100k
Q907
R1020
6.8k
R322
91
R321
160
D913
V
5
.
5
+
SA101
300V
p
0
8
6
1
0
1
C
p
0
8
6
2
0
1
C
R927
47k
R928
470k
R948
0
R152
47k
R163
12
R167
27
C161
10u
C176
22u
1
7
1
Q
B
C
E
R1021
4
.7k
p
0
8
6
2
2
1
C
p
0
8
6
1
2
1
C
Q909
D907
4
3
1
2
IC902
1
3
2
4
R937
1.2k
D911
Q904
Q900
Q1010
D133
AK
Q1012
Q908
Q917
D912
C
N
HOOK_DET
HOOK_1
HOOK_2
R942
k
0
0
1
1
4
9
C
p
0
1
2
4
9
C
p
0
1
3
4
9
C
p
0
1
4
4
9
C
p
0
1
D113
AK
1
1
1
Q
B
C
E
4
2
5
C
p
0
1
5
2
5
C
p
0
1
D906
C323
10p
D910
C910
100p
D908
D909
R1014
2.2k
7
7
1
R
k
1
C177
NC
u
p
a
_
T
A
B
V
D143
NC
IC501
1
GPIO[20]
2
GPIO[21]
23
MIP
3
GPIO[22]
4
GPIO[23]
5
GPIO[24]
6
GPIO[25]
7
GPIO[26]
8
VDDC2
24
HSMIN
25
HSMIP
26
MPWR
27
HSSPOUT
P
28
LOUT
29
SPOUTN
30
VCCPA
81
GPIO[13
]
82
GPIO[14
]
83
GPIO[15
]
84
GPIO[16
]
85
GPIO[17
]
86
VDDIO2
87
GPIO[18
]
88
GPIO[19
]
89
GND
9
COREOUT
0
1
T
A
B
V
1
1
DOUBCAPN1
2
1
DOUBCAPN
3
1
DOUBCAPP
4
1
DOUBCAPP1
5
1
DOUBOUT
6
1
DCIN0/LIN0
7
1
DCIN1
8
1
DCIN2
9
1
DCIN3/LIN1
0
2
F
E
R
V
1
2
A
C
C
V
2
2
MIN
31
SPOUTP
32
PWM1
33
PWM0
34
DCINS
35
XOUT
36
XIN
37
VBA
T_A
P
U
38
VDD_AP
U
39
VCC_IF
40
VDD_IF
41
VCC_FE
42
ANT
43
TRSW_n
44
TXn
67
68
GPIO[1]/SDA_II
C
69
GPIO[2
]
70
GPIO[3
]
71
GPIO[4
]
72
GPIO[5
]
73
GPIO[6
]
74
GPIO[7
]
75
GPIO[8
]
76
VDDIO1
77
GPIO[9
]
78
GPIO[10
]
79
GPIO[11
]
80
GPIO[12
]
C171
4700p
C168
2.2u
IC611
EEPROM
128K
1
0
E
2
1
E
6
L
C
S
7
*WC
3
2
E
8
C
C
V
4
S
S
V
5
A
D
S
Q902
HOOKSW
DP click
pass
(YELLOW)
(GREEN)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
RX
TX
Caller ID
Bell
Power Failure
Ringing
1.2V