75
KX-TG3721BX/KX-TG3722BX/KX-TGA371BX
KX-TG3721/3722
BX SCHEMATIC DIAGRAM (Base Unit_Main)
NC: No Components
QSPI_CS
QSPI_IO3
QSPI_IO2
QSPI_SCK
QSPI_IO1
SPI2_CLK
LCD_CS
MSG_LED
QSPI_SCK
QSPI_IO3
QSPI_IO2
QSPI_IO1
QSPI_IO0
QSPI_CS
LCD_CD
LCD_RST
ANS_LED
EEP_WP
SCL2
SDA2
QSPI_IO0
PF_SUP
ACFL
SPI2_DO
RF_TXp
TXON
RF_TXn
R501
F56k
R891
220
RF_RXn
ANT1
RF_RXp
C520 NC
C502 1u
C503 10p
C504 0.1u
L1T
L1R
HAK_CL1
R311
10k
C104
0.01u
C107
0.01u
R106
1M
C108
0.01u
R105
1M
R104
180k
R102
4.7M
R103
180k
C103
0.01u
R101
4.7M
R312
10k
+1.8V
R107
1k
R108
1k
C110
820p
R110
82k
C109
820p
R109
82k
C611
0.1u
R611
10k
C516
0.1u
C515
NC
C514
NC
ANT2
R892
220
+3.0_CP
+2.4V
R121
1k
C113
0.082u
R111
3.9k
R112
120k
C111
0.033u
R125
270
R122
1k
R123
1k
R178
3.3k
C172
10p
+3.0V
C343
10p
R355
680
C322
NC
C321
1u
+5.5V
R354
10k
+3.0V
CHARGE-
C351
1u
DCP
+5.5V
F301
3.0A
CHG+
+5.5V
DCM
+3.0V
GND
+3.0V
+3.0_CP
R612
3.3k
R613
3.3k
C517
0.1u
C518
0.1u
C501
0.1u
C123
10p
C112
10p
C124
10p
C125
10p
R364
10k
Q351
+3.0V
CHG+
R322
100
R321
140
+3.0_CP2
+3.0_CP2
C346
NC
3
IN
2 OUT1
1
ADJ
4 OUT2
Q362
B
C
E
Q361
D361
NC
A K
D362
A
K
C352
NC
R352
56k
2.7V
2
VIN
1 VOUT
3
NC
4
VSS
R351
3.9k
R353
10k
R365
47k
R366
10k
R359
10k
Q363
Q352
R373
1.8k
R358
10k
+1.8V
R371
1
(0.5W)
R372
1
(0.5W)
C519
0.1u
C342
0.1u
C311
1u
C312
1u
VDD1
VDD2
VDD3
X501
10.368M
1
3
2
Q354
Q301
Q302
C345
220u
D301
NC
R360
56k
+5.5V_1
+5.5V_1
+5.5V_1 +5.5V_1
L351
*P101 22
+1.8V
R131
10M
R166
8.2k
*R146
NC
*C164
NC
R144
NC
TP10
*R143
NC
*C167
1000p
L101
33u
*D142
30V
A K
A K
Q142
B
C
E
R151
100k
C161
10u
GAP
R161
100k
C173
0.1u
R181
NC
C181
NC
*Q144
NC
R152
470k
R163
12
*R168
NC
C184
K1.0u
C168
NC
D101
4
3
1
2
C171
0.022u
R162
27k
C186
NC
*R148
NC
*D143
NC
R142
2.7k
(3216)
R167
27
(4532)
Q161
B
C
E
*R165
27k
TP9
SA103
NC
2
1
C165 NC
C142
K0.01u
D153
NC
A K
R164
2.7k
*Q141
B
E
C
R145
2.2k
C132
K0.01u
*R147
NC
L102
33u
SA101 270V
2
1
R141
100k
*R169 0
C163 NC
*R160
910
D133
A K
*R170
0
C152
0.01u
1
A0
2 A1
6
SCL
7
WP
3 A2
8
VCC
4 VSS
5
SDA
1
VSS_LNA1 2
RF_RXn
3
RF_RXp
4
VSS_LNA2
5
RFP1
6
RFP0
7
REF_RES
8
AVS_XTAL
9
XTAL2
10
XTAL1
11
AVD_XTAL
12
RF_SUPPLY1
13
VDD1
14
P4_0/SPI2_EN
15
P4_1/SPI2_CLK
16
P4_4
17
PARADET/P3_4
18
RINGOUT/RINGING/P3_5
19
RINGn/P3_6
20
RINGp/P3_7
21
CIDINp/P3_2
22
VREFp
23
CIDINn/MICp
24
CIDOUT/MICn
25
MICh
26
VREFm
27
LSRp
28
LSRn
29
ONE_CELL
30
AVD
31
LDO_CTRL
32
ADC0/P3_3
33
ADC1/INT0/P1_0
34
NTC/ADC2
35
SOCp
36
SOCn
85
WLED_CUR_1
86
WLED_CUR_2
87
P2_1/ECZ2/PWM1/LED4
88
P2_0/ECZ1/PWM0/LED3
89
VDD3
90
LDORF_CTRL
91
RFP0n
92
RF_SUPPLY2
93
RF_SUPPLY_PA
94
RF_TXn
95
RF_TXp
96
RFP2
133
VSS/GND
109
DC_CTRL
108
DC_I
111
DC_CTRLN
107
DC_SENSE
100
P4_2/SPI2_DO
101
P4_3/SPI_DI
129
P5_6
130
P5_7
125
QSPI_CS
122 VDDIO
121
QSPI_IO0
126
QSPI_IO1
123
QSPI_IO2
119
QSPI_IO3
120
QSPI_SCK
115
ULP_MAIN_CTRL
97 VSS/GNDplane1
98 VSS/GNDplane2
99 VSS/GNDplane3
102 VSS/GNDplane4
103 VSS/GNDplane5
104 VSS/GNDplane6
105 VSS/GNDplane7
106 VSS/GNDplane8
112 VSS/GNDplane9
113 VSS/GNDplane10
118
ULP_PORT
116
ULP_VBAT
117
ULP_XTAL
110
VBAT
131 VSS/GNDplane15
128 VSS/GNDplane14
127 VSS/GNDplane13
124 VSS/GNDplane12
114 VSS/GNDplane11
132 VSS/GNDplane16
C306
100u
8M FLASH
1 *CS
2 SO/SIO1
6
SCLK
7
NC/SIO3
3 *WP/SIO2
8
VCC
4 GND
5
SI/SIO0
+5.5V
C101 680p
C102 680p
C105 680p
C106 680p
R133
180k
R132
2M
C523
10p
C341
220u
C344
1000u
R361
68
R362
68
R363
2.2k
C301 100p
C353 33p
R301 NC
5XX : BBIC
6XX : FLASH, EEPROM, KEY, LCD
(YELLOW)
7XX : FOR DK/BT
(GREEN)
1XX : TEL LINE
8XX : RF
REFERENCE
CID+
3XX : POWER, CHARGE
RX
4XX : MIC, SP
HOOK
DCIN2
TX
DCIN1
CID-
PULSE_MUTE
IC302
IC351
IC611
IC501
IC501
IC502
(1)
(2)
VDD1: 1.8V
VDD2: 2.5V
from Handset
From
Handset
to Handset
DCP: 5.5V
Battery power supply
from Handset
in power outage.
VDD3: 3.0V
to Q301
Rx
Tx
Caller ID
Bell