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Only for training and service purposes
LGE Internal Use Only
3. TECHNICAL BRIEF
3.6 H/W Sub System
3.6.1 RF Interface
A. RTR6285 (WCDMA_Tx, GSM_Tx/Rx)
MSM7227 controls RF part(RTR6285) using these signals.
y
SSBDT : SSBI I/F signals for control Sub-chipset
y
TX_ON : Power AMP on RF part
y
RX0_I/Q_M/P,TX_I/Q_M/P : I/Q for T/Rx of RF
y
TX_AGC_ADJ : control the gain of the Tx signal prior to the power amplifier
y
DAC_REF : Reference input to the MSM Tx data DACs
B. the others
y
TRK_LO_ADJ: TCXO(19.2M) Control
y
PA_ON0/PA_RANGE0 : WCDMA(1900) TX Power Amp Enable
y
ANT_SEL[0-2]: Ant Switch Module Mode Selection(WCDMA,GSM Tx/Rx,DCS-PCS Tx/Rx)
y
GSM_PA_BAND: GSM/DCS-PCS Band Selection of Power Amp
y
GSM_PA_RAMP: Power Amp Gain Control of APC_IC
y
GSM_PA_EN: Power Amp Gain Control Enable of APC_IC
C. ALM2412 (A-GPS LNA)
* GPS_LNA_EN: GPS LNA Enable Signal (GPS LNA Shutdown)
3. Technical Brief
PA_ON0/PA_RANGE0/GPIB22 : WCDMA(2100, 900) TX Power Amp Enable
ANT_SEL[0-], GPIO 72 ~75: Ant Switch Module Mode Selection(WCDMA,GSM Tx/Rx,DCS-PCS Tx/Rx)