11
KX-TG4222CB/KX-TG313CSK/KX-TGA421CB/KX-TGA421CN
KX-TG4221C SCHEMATIC DIAGRAM (Base Unit_Main)
NC: No Components
(1)
(2)
(3)
(4)
(6)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
(16)
(18)
(17)
(5)
(7)
1.2V
3.0V
Rx
Tx
Caller ID
Bell
UTX
URX
SPI_CLK
SPI_DO
SPI_DI
BELL
HOOK
HOOK
SPI_CLK
SPI_DO
SPI_DI
BELL
KEYS_C
SPI_CS
KEYIN2
KEYIN3
KEYS_D
KEYIN1
SPI_CS
KEYS_E
ANS_LED
EEP_WP
EEP_SCL
EEP_SDA
C120
1000p
ZA1
NC
1
2
6
7
9
11
8
10
12
R131
10M
L1R
+5.5V
C351
1
u
C133
NC
R133
330k
C611
0.1
u
R501 10
VDDC
C331
N
C
DCP
C521
1
u
C111
0.047
u
R141
100k
+3.0V
C142
K
0.01
u
C509
12p
C124
NC
C151
NC
L1T
DCM
C132
K0.01
u
VBAT
+3.0V
+3.0V
VCCA
+5.5V
+3.0V
+3.0V
R112
100k
C185
NC
R113
10k
C522
NC
+3.0V
F301
3.0A
CHARGE-
C186
10p
R142
2.7k
C504
1
u
C123
NC
R145
2.2k
R111
100k
GND
L501
100n
C113
K0.68
u
R121
390k
C519 0.1
u
+5.5V
R122
390k
C112
0.047
u
+5.5V
C501
0.1
u
C520
0.1
u
VDDC
HAK_CL1
CHG+
GND
R322
100
R321
140
IC302
3
IN
2
OUT1
1
ADJ
4
OUT2
D361
NC
AK
C502
10
u
C503
10
u
C505 10
u
C511
10
u
D362
1SR154
A
K
Q142
B
C
E
*SA101
300V
SA103
NC
2
1
Q111
D113
AK
D133
AK
D153
NC
AK
R164
2.7k
R161
100k
C16
8N
C
R151
100k
C152
0.01
u
R177
1k
Q171
Q161
B
C
E
C161
10
u
R165
2
7k
+3.0V
C164
NC
R331
68k
R332
33k
RA611
3.3k
1
2
3
4
6
7
8
RA151
1k
1
2
3
4
L474
NC
L476
NC
C342
0.1
u
C181
NC
C184
1
u
C321
1
u
C506
1
u
C510
1
u
C163 NC
D101
1
4
3
2
C507
2.2
u
R510
10k
IC611
1
A0
2
A1
6
SCL
7
WP
3
A2
8
VCC
4
GND
5
SDA
C341
330
u
C101 680p
C102 680p
C121
680p
C122
680p
R163
39
R152
130k
R176
1k
R175
3.9k
R172
680k
R371
1
R372
1
VREF
VCCA
VDDC
C176
1
u
R114
47k
1
2
*D142
25V
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
HSSPOUTP
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
9
COREOUT
10
VBAT
11
DOUBCAPN1
12
DOUBCAPN
13
DOUBCAPP
14
DOUBCAPP1
15
DOUBOUT
16
DCIN0/LIN0
17
DCIN1
18
DCIN2
19
DCIN3/LIN1
20
VREF
21
VCCA
22
MIN
31
SPOUTP
32
PWM1
33
PWM0
34
DCINS
35
XOUT
36
XIN
37
VBAT_APU
38
VDD_APU
39
VCC_IF
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]
C173
0.1
u
C167 1000p
C171
0.022
u
C175 560p
C178
0.033
u
R160
820
R171
220
R168 4.7k
*R115
NC
*C115 NC
*P101
*Q141
*D143
NC
*SA102
NC
*R162
47k
(YELLOW)
(GREEN)
GND
*IC501
5
3
3
5
4
REFERENCE
7XX : FOR DK/BT
3XX : POWER, CHARGE
5XX : BBIC
6XX : FLASH, EEPROM, KEY, LCD
4XX : MIC, SP
1XX : TEL LINE
8XX : RF
!
