Hardware Sub System Of Msm6275 - LG KS10 Service Manual

3.12. Hardware sub system of MSM6275

3.12.1. RF Interface
3.12.1.1. RTR6250 (WCDMA_Tx, GSM_Tx/Rx)
MSM6275 controls RF part(RTR6250) using these signals.
• SBST,SBDT,SBCK : SBI I/F signals for control Sub-chipset
• PA_ON : Power AMP on RF part
• RX_I/Q,TX_I/Q : I/Q for Tx/Rx of RF
• TX_AGC_ADJ : control the gain of the Tx signal prior to the power amplifier
3.12.1.2. RFR6250 (WCDMA_Rx)
• SBST,SBDT,SBCK : SBI I/F signals for control Sub-chipset
• RX_I/Q, : I/Q for Rx of RF
3.12.1.3. The others
• GSM_PA_BAND : DCS/GSM Band Selection of Power Amp
• TRK_LO_ADJ : TCXO(19.2M) Control
• PA_ON : WCDMA TX Power Amp Enable
• ANT_SEL[0-2] : Ant Switch Module Mode Selection (WCDMA,GSM Tx/Rx,DCS Tx/Rx)
• GSM_PA_RAMP : Power Amp Gain Control of APC_IC
• GSM_PA_EN : Power Amp Gain Control Enable of APC_IC
• GSM_TX_VCO_0_EN_N : GSM Band Tx VCO Enable of Dual VCO
• GSM_TX_VCO_1_EN_N : DCS Band Tx VCO Enable of Dual VCO
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
- 51 -
LGE Internal Use Only