LG KU250 Service Manual - Page 51
H/W Sub System
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3. TECHNICAL BRIEF 3.11 H/W Sub System 3.11.1. RF Interface A. RTR6275(WCDMA_Tx, GSM_Tx/Rx) MSM6245 controls RF part(RTR6275) using these signals. • SBST : 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 XMEM1_CS_N3_SDRAM1_CS_N1_GPIO77 L25 UART3_RFR_N_GPIO87 H6 UART2_DP_RX_DATA_GPIO89 F18 SYNTH0_GP_PDM0_GPIO92 SBST1_GPIO93 H18 TX_AGC_ADJ H13 L13 TRK_LO_ADJ F19 TCXO_EN_GPIO94 F17 PA_ON0 A12 Q_OUT_N B12 Q_OUT A13 I_OUT_N B13 I_OUT F12 DAC_REF Q_IM_CH1 Q_IP_CH1 I_IM_CH1 I_IP_CH1 Q_IM_CH0 Q_IP_CH0 I_IM_CH0 I_IP_CH0 W23 V23 V25 W25 AA25 Y25 AB25 AC25 GP_PDM2_PA_RAN_GE1 D17 GP_PDM1_PA_RAN_GE0 H17 H15 TRST_N D16 TCK F15 TMS D15 TDI TDO A17 RTCK H16 AUX_PCM_CLK_GRFC14_GPIO80 K19 N21 AUX_PCM_DIN_GRFC13_GPIO14 G4 AUX_PCM_DOUT_GRFC12_GPIO103 J8 AUX_PCM_SYNC_GRFC11_GPIO102 H12 TX_ON_GRFC10 B4 GRFC8_GPIO11 T23 GRFC7_GPIO10 T19 GRFX6_GPIO9 D11 GRFC5_AUX_SBST_GPIO8 H10 GRFC4_AUX_SBCK_GPIO7 F10 GRFC3_GPIO6 D9 GRFC2_GPIO5 A8 GRFC1_AUX_SBDT_GPIO4 B8 GRFC0_GPIO3 G23 BT_CLK_GPIO25 F23 BT_SBST_GPIO24 E26 BT_SBCK_GPIO23 BT_SBDT_GPIO22 E25 BT_TX_RX_N_GPIO21 H21 BT_DATA_GPIO20 R19 RCV_EN_N LCD_IF_MODE_1 TCXO_EN PA_ON TX_QM TX_QP TX_IM TX_IP DAC_REF RF RX_QM RX_QP RX_IM RX_IP 33nF C246 Close to MSM 2K R213 TX_AGC_ADJ TRK_LO_ADJ PA_R0 SPK_AMP_EN TX_ON ANT_SEL1 ANT_SEL0 GSM_PA_BAND GSM_PA_EN BT_CLK BT_SBST BT_SBCK BT_SBDT BT_TX_RX_N BT_DATA Figure 1.15 Schematic of RF Interface of MSM6245 - 52 -
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