LG GT500 - Page 37

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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL DESCRIPTION
GT500 A-GPS Schematic
Figure 3-1-16. Schematic of BCM4750
GPS LNA block
100p
C772
C771 0.1u
ALM-1612
FIL_OUT
43
GND
RF_IN
2
1
S_D
VDD
5
2.2u
U770
C770
TP751
C757NA
L750 6.8nH
C764 1u
VDDE_1V8
C762 1u
VGPS_1V8
2.2nH
L770
10nH
L771
0R772
VSSD1
VSSD2
D3
D7
VSSD3
E4
VSSD4
VSSD5
E5
VSSD6
F4
VSSIFSUB
B3
C1
VSSRFSYNTH
TDO
F1
TESTMODE
TMS
A5
TRST_N
A6
G6
TX_SDA_MISO
D4
VDDCORE1 VDDCORE2
D6 E3
VDDCORE3 VDDCORE4
E6
VDDIFSYNTH
D1
VDDIO1
B6
G3
VDDIO2
VDDIO3
G7
F6
VDDLP_LPREGOUT
VDDRF
D2
VPD
D5
B5
CNTIN
G1
CTS_N_I2C_GRP1_SCS_N
F7
INTR_N
A3
LPREGIN
RESET_N
G4
RFIN
B1 E2
RFREGOUT
E1
RFSREGOUT
F5
RTCCLK
RTS_N_I2C_GRP0_MOSI
G5
RX_SCL_SCK
G2
F3
STANDBY_N
SYNC_PPS
E7
A7
TCK
TCXO
A2
TDI
C7 B7
U751
ATEST0
B2
ATEST1
C3
BBREGOUT
A4
C4
BBRFREGIN
BMS0
C6 B4
BMS1_I2C_A0 BMS2_UARTCS_N
C5
F2
BCM4750
C7552.2nH
100nH C758
100nH
L772
0
R750
C761 1u
VDDE_1V8
1u C763
TP753
1
CN750
1
CN751
X750
1
GND1 GND2
3
NC1
25
NC2
OUT
4
VCC
6
KT2520F16369ACW18T
100K
R756
TP752
C751 0.1u
C760 1u
2.2u C750
C752 1u
C756 0.5p
1u C759
VGPS_1V8
10
R770
R757
0
ACC_GP_GPS_PON
GPS_CNTIN
ACC_UART3_TX
ACC_GP_GPS_PON
ACC_GPS_START
RTCCLK
ACC_UART3_CTS
ACC_GP_GPS_RESETn
ACC_UART3_RTS
ACC_UART3_RX
GPS Power
0
R755
C766 1u
VGPS_1V8
VBAT
1uC765
3
CE
2
GND
5
PGND
VDD
41
VOUT
RP101K182D U752
ACC_GP_GPS_PON
GPS Clock Buffer
R754
100K
0.1u
C753
R752
10
33
R753
C754 2.2u
VDDE_1V8
A GND OE VCC
Y
NL17SZ126XV5T2G
U750
MCLKSEC
GPS_CNTIN
ACC_GP_GPS_PON