3. TECHNICAL BRIEF
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Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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ͽͶ͑ ͺΟΥΖΣΟΒΝ͑ ΆΤΖ͑ ΟΝΪ͑
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3.12 H/W Sub System
3.12.1 RF Interface
3.12.1.1 RTR6285 (WCDMA_Tx, GSM_Tx/Rx)
MSM7227T controls RF part(RTR6285) using these signals.
-RTR6285_SSBI : SSBI I/F signals for control Sub-chipset
-RTR_TXON : Power AMP on RF part
-RTR_RX_I/Q_M/P, RTR_TX_I/Q_M/P : I/Q for T/Rx of RF
-RTR_DAC_REF : Reference input to the MSM Tx data DACs
3.12.1.2 The others
TRK_LO_ADJ : TCXO(19.2M) Control
PA_ON0/PA_RANGE0 : WCDMA(2100) TX Power Amp Enable
ANT_SEL[0-3] : Ant Switch Module Mode Selection(WCDMA,GSM Tx/Rx,DCS-PCS Tx/Rx)
GSM_PA_RAMP : Power Amp Gain Control of APC_IC
3.12.1.3 RF2815 (GPS LNA)
* GPS_LNA_EN : GPS LNA Enable Signal (GPS LNA Shutdown)
RF Interface Block Diagram
RTR6285
VCTCXO
19 2MH
W2100
W2100
TRK LO ADJ
Gelato RF Block Diagram
MSM7227T
D-Flip
RTR6285
PM7540
HB_RF_OUT3
19.2MHz
W2100
PAM
W2100
DUPLEXE
R
WCDMA
TX SAW
GPIO 105
TCXO E
TRK_LO_ADJ
TCXO I
BUFFER
USBPHY_SYSCLK
Flop
Coupler
PRX_IP
PRX_IN
TCXO
LB_RF_OUT2
TX_BIAS
WPRXLBP
PRX QP
I_IP_CH0
I_IM_CH0
Q IP CH0
PDET_IN
W900
DUPLEXE
R
W900
PAM
WCDMA
TX SAW
GPIO_105
TCXO_E
N
SSBI
TCX
O
TCXO_OUT
TCXO_I
N
Coupler
Tx
DRX_IP
DRX_IN
WPRXLBP
WPRXLBN
WPRXSE2
PRX_QP
PRX_QN
DRX_QP
DRX_QN
Q_IP_CH0
Q_IM_CH0
I_IP_CH1
I_IM_CH1
Q_IP_CH1
Q_IM_CH1
WPRXSE2_OUT
Module
SKY77544
Included
GSM PAM
TX_QP
TX_QN
LB RF OUT1
DAC IREF
GPS_IN
TX_IP
TX_IN
DAC REF
I_OUT_P
I_OUT_N
Q_OUT_P
Q_OUT_N
Rx SAW
LNA
GPS_LNA_EN
W2100
RX saw
WB_MX_INP
WB_MX_INM
GSM900
GCELL_INP
GCELL_INN
EGSM_INP
EGSM INN
HB_RF_OUT1
LB_RF_OUT1
RF_ON
_
SBDT
GPIO_59
TX_ON
_
WCDMA_900_ON PA_ON1
WCDMA 2100 ON
PA ON0
GSM850
DCS1800
PCS1900
Rx_GSM_850
Rx GSM 900
EGSM_INN
DCS_INP
DCS_INN
GPCS_INP
GPCS_INN
WPRXSE1_IN
VDDA
GPIO_106
GPIO_57
WCDMA_2100_ON PA_ON0
GPIO_79
GPIO_80
PA_PWR_CTL
Rx_GSM_900
Rx_DCS
Rx_PCS
Ant Sel
0,1,2,3
GPIO_[72:75]
GSM_PA_EN, GSM_PA_BAND
GSM_PA_RAMP