H/W Sub System - LG CU920 Manual

3. TECHNICAL BRIEF

3.10 H/W Sub System

3.10.1 RF Interface
A. RTR6275 & RFR6275
MSM6281 controls RF part(RTR6275, RFR6275) using these signals.
• SSBDT_RTR/RFR : SSBI I/F signals for control Sub-chipset
• PA_ON1 : Power AMP on RF part
• RX0_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
• DAC_REF : Reference input to the MSM Tx data DACs
B. the others
• TRK_LO_ADJ : TCXO(19.2M) Control
• PA_ON : WCDMA(1900) TX Power Amp Enable
• ANT_SEL[0-2] : Ant Switch Module Mode Selection(WCDMA,GSM Tx/Rx,DCS-PCS Tx/Rx)
• GSM_PA_BAND : GSM/DCS-PCS Band Selection of Power Amp
• GSM_PA_RAMP : Power Amp Gain Control of APC_IC
• GSM_PA_EN : Power Amp Gain Control Enable of APC_IC
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