Panasonic KX-TG8421EB - Block Diagram (Handset)

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KX-TG8421E/KX-TG8422E/KX-TG8423E/KX-TG8424E/KX-TGA840E
4.3. Block Diagram (Handset)
SPEAKER
RECEIVER
MIC
MIC
DET
SP
HEADSET
CHARGE CIRCUIT Q4, Q9, R7
Q4, Q9, R7
CHARGE CONTACTS
CHARGE(+)
CHARGE(-)
CHARGE_CTRL
CHARGE
EEPROM
SCL
SDA
BATTERY TERMINAL
D7
VBAT
J1
J2
1.8 V
Q2
1.8 V
LCD
CD
RESET
CSB SDA
SCL
CPU
Analog
Front
End
D/A A/D
33 35
15 16
19 20 18 28
32 31 57 58
36
13
43 42
63 54 55 66
ADPCM
Codec
Filter
DSP
Speech
Decoding
Speech
Encoding
BMC
Burst
Decoding
RF PA
IC801
Burst
Encoding
RF
PLL
MOD/DEMOD
5 3
4 3 6 7
8
9
2
77 78
75
RXn
RXon
ANT
DA801
RXp
TXp TXn Pon PSEL TXon
VDD-PADRY
9
10
XTAL
X1
10.368 MHz
BATTERY
44
ON SWITCH
KEYPAD
Charge
Pump
ROWS
COLUMNS
CP2.5V CP4.0V
48, 49, 50, 51
22, 23, 24, 25, 26
BBIC
IC1
IC3
56
LCD-BACK LIGHT
KEY LED BELL LED
42 52 68
73 74 80
LDO_CTRL
KX-TGA840 BLOCK DIAGRAM (HANDSET)
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