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5
3 CHANGES (Suffix Code: D or later)
3.1.
Technical Descriptions
3.1.1.
Block Diagram (Handset)
[Changed from original section “4.7. Block Diagram (Handset)”]
QSPI
FLASH MEMORY
IC4
Reset
Reset
Pin 71
SPEAKER
RECEIVER
MIC
CHARGE
CIRCUIT
Q2, Q3, Q4,
Q9, R8
CHARGE
CONT
A
CTS
)
CHARGE_CTRL
CHARGE_DET
BATTERY
TERMINAL
R45
VBAT
BATT-
1.8 V
Q1
1.8 V
LCD
CD
RESET
CS
SID
SCL
CPU
Analog
Front
End
D/A
A/D
35
37
21
22
17
18
34
33
32
24
44
45
73
63
64
77
76
ADPCM
Codec
Filter
DSP
Speech
Decoding
Speech
Encoding
BMC
Burst
Decoding
ANT1
Burst
Encoding
RF
PLL
MOD/DEMOD
1
2
87
86
RXn
ANT1
RXp
TXp
TXn
7
8
XTAL
X1
10.368
MHz
BATTERY
46
ON SWITCH
KEYPAD
Charge
Pump
ROWS
COLUMNS
CP3V
CP4V
55, 57, 58, 59, 60
11, 12, 13, 14, 62
47, 48, 51, 53 QSPI-IO 0-3
BBIC
IC1
65
LCD-BA
CK LIGHT
KEY LED
61
79
80
78
NR(Noise Reduction) LED
BELL LED x 2
TGEA20 Only
LDO_CTRL
1.8 V
CP3V
QSPI
Control
52 QSPI-SCK
49 QSPI-CS
LCD_LED0
CP4V
CP4V
CP3V
1.8 V
GND
KX-TGEA20 BLOCK DIAGRAM (HANDSET)