LG KF750 Service Manual page 28

3.1.4 RF Interface
A. Asta Interface
Asta controls GSM RF part using these signals through GSM RF chip-Gimli.
• RF_DATA_A
• RF_DATA_B
• RF_DATA_C
• RF_DATA_STRB
RF_DATA_STRB
B. WCDMA Radio Link Interface
• RF_WCDMA_PA_0_EN
• RF_WCDMA_PA_1_EN
• RF_WCDMA_DCDC_EN
• RF_WCDMA_PWRDET_EN
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Y4
RF_DATA_A
AA2
RF_DATA_B
Y3
RF_DATA_C
Y2
Figure 3-1- 5. Schematic of Asta RF Interface
RF_DATA_A
RF_DATA_B
RF_DATA_C
RF_DATA_STRB
RF_WCDMA_PA_0_EN
RF_WCDMA_PA_1_EN
RF_WCDMA_DCDC_EN
RF_WCDMA_PWRDET_EN
ADC_I_NEG
ADC_I_POS
ADC_Q_NEG
ADC_Q_POS
DAC_I_NEG
DAC_I_POS
Figure 3-1-6. Schematic of WCDMA RF Interface
3. TECHNICAL BRIEF
QDATA_AMP_MSB
IDATA_FREQ_MSB
AMP_LSB_FREQ_LSB
DCLK_DATSTR
Y4
AA2
Y3
Y2
AB8
V7
AB5
AB6
Y10
W10
W9
Y9
Y8
W8
W7
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QDATA_AMP_MSB
IDATA_FREQ_MSB
AMP_LSB_FREQ_LSB
DCLK_DATSTR
WTX_BAND_1_EN
TP300
WDCDC_EN
WPOW_DET_EN
WRX_I_N
WRX_I_P
WRX_Q_N
WRX_Q_P
WTX_I_N
WTX_I_P
LGE Internal Use Only