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KX-TG6431M/KX-TG6431T/KX-TGA641M/KX-TGA641T
7.5.
Schematic Diagram (Handset_Main)
RF circuit
RXI
TXO
BCLK
TX_DATA
SLOT_CTRL
SLOT_CTRL
RX_DATA
DVCC
RADIO_EN
RF_RSTN
SYN_DATA
NCC519
SYN_EN
SYN_CLK
SYN_OUT
V_PA
2.7V
IC741
V_RF
2.7V
NC
4
ON/OFF
VSS
VOUT
5
VIN
ANT1
ANT1
ANT2
ANT2
DOWN
*
MENU
0
UP
SYA
5.0V
3.1V
RA553
NC
RA551
RA552
330
330
Q562
Q563
NC
KEY_BACKLIGHT
LCD_BACKLIGHT
(Amber)
(Amber)
NC: No Components
BCLK
R540
NC
TX_DATA
RX_DATA
RF control line
RF_RSTN
2.7V
3.1V
SYN_DATA
SYN_EN
3.1V
IC546
SYN_CLK
SYN_OUT
1
8
SI
SO
2
7
SCK
GND
3
6
*RESET
VCC
4
5
*CS
*WP
NC
3
RF_POWER
2
For Flash Boot
1
TX_EN
LEFT
TALK
SP
KIN_5
7
4
1
KIN_4
8
5
2
KIN_3
9
6
3
TE
KIN_2
RIGHT
OFF
FLASH
KIN_1
3.1V
5.0V
3.1V
3.1V
5.0V
R560
NC
1
6
VIN
VOUT
2
5
C+
GND
3
4
ON/*OFF
C-
5.0V
IC561
Charge pump for
Q561
LCD back light
5.0V
BELL_LED
(Amber)
White_LED
LCD_BACKLIGHT
C540
K0.1
26
RADIO_EN
27
HEAD_DET
28
GND6
29
VCC1
SYN_EN
30
SYN_EN
SYN_CLK
31
SYN_CLK
SYN_DATA
32
SYN_DATA
33
NC4
34
TX_EN
35
KEY_BL_LED
RX_DATA
36
RX_DATA
37
NC
38
CHG_DET
39
NC
40
LCD_BACK_LIGHT
41
NC
42
CHG_CTL
43
NC
44
DB
45
DB
SCL
46
DB6(SCL)
SID
47
DB7(SID)
48
GND7
49
VCC2
50
RESET
RESET
20ms
CI
Power ON (Reset)
2.7V
C568
NC
C566
NC
OTP
26
RST
X501
C515
13.824M
K0.1
R501
C514
1M
10uF
6.3V
100
SPPN
99
VCC4(PCCPA)
98
SPN
97
SPP1
96
IBAT2
95
HSM
94
VCCA
93
GND10(GNDA)
92
MICBIAS
91
MIM
90
MIP
89
IC501
VREF
88
IBAT1
87
PDN
86
GND9
85
EEPROM_WP
84
UART_RX
83
UART_TX
82
EEPROM_DATA
81
EEPROM_CLK
80
FB2
79
FB1
78
KIN_5
77
KIN_4
76
KIN_3
TCK
TMS
TDI
TDO
RA501
4.7k
2.7V
IC541
R578
EEPROM-16K
NC
1
8
A0
VCC
C578
2
7
A1
WP
K1.0
3
6
A2
SCL
4
5
VSS
SDA
Parameter saving EEPROM
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
(16)
(17)
(18)
(19)
(20)
(21)
(22)
(23)
(24)
(25)
(26)
(27)
(28)
(29)
(30)
(31)
(32)
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