LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.11. H/W Sub System
3.11.1. RF Interface
A. RTR6275(WCDMA_Tx, GSM_Tx/Rx)
MSM6280 controls RF part(RTR6275) using these signals.
• SSBDT_RTR : SSBI I/F signals for control Sub-chipset
• RX_I/Q_M/P,TX_I/Q_M/P : I/Q for T/Rx of RF
• TX_AGC_ADJ : control the gain of the Tx signal prior to the power amplifier
3. TECHNICAL BRIEF
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Figure. Schematic of RF Interface of MSM6280
Near to MSM
(WCMDA 2100PAM Enable)
TP313
33nF
C617
2K
R1121
TCXO_EN_GPIO94
F19
TRK_LO_ADJ
L13
H13
TX_AGC_ADJ
SYNTH0_GP_PDM0_GPIO92
SBST1_GPIO93
H18
PA_ON0
F17
AA25
Q_IM_CH0
Q_IM_CH1
W23
Y25
Q_IP_CH0
Q_IP_CH1
V23
B12
Q_OUT
A12
Q_OUT_N
AB25
I_IM_CH0
V25
I_IM_CH1
AC25
I_IP_CH0
W25
I_IP_CH1
I_OUT
B13
I_OUT_N
A13
H17
GP_PDM1_PA_RAN_GE0
D17
GP_PDM2_PA_RAN_GE1
F12
DAC_REF
PA_R0
TX_AGC_ADJ
AP_1.2V_EN
SLIDE_DET_N
RX_QM
RX_QP
RX_IM
RX_IP
PA_ON0
TRK_LO_ADJ
TCXO_EN
DAC_REF
TX_QM
TX_QP
TX_IM
TX_IP