H/W Sub System - LG U250 Service Manual

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
UART3_RFR_N_GPIO87
UART2_DP_RX_DATA_GPIO89
SYNTH0_GP_PDM0_GPIO92
GP_PDM2_PA_RAN_GE1
GP_PDM1_PA_RAN_GE0
AUX_PCM_CLK_GRFC14_GPIO80
AUX_PCM_DIN_GRFC13_GPIO14
AUX_PCM_DOUT_GRFC12_GPIO103
AUX_PCM_SYNC_GRFC11_GPIO102
GRFC5_AUX_SBST_GPIO8
GRFC4_AUX_SBCK_GPIO7
GRFC1_AUX_SBDT_GPIO4
BT_TX_RX_N_GPIO21
L25
H6
F18
H18
SBST1_GPIO93
H13
TX_AGC_ADJ
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
W23
Q_IM_CH1
V23
Q_IP_CH1
V25
I_IM_CH1
W25
I_IP_CH1
AA25
Q_IM_CH0
Y25
Q_IP_CH0
AB25
I_IM_CH0
AC25
I_IP_CH0
D17
H17
H15
TRST_N
D16
TCK
F15
TMS
D15
TDI
A17
TDO
H16
RTCK
K19
N21
G4
J8
H12
TX_ON_GRFC10
B4
GRFC8_GPIO11
T23
GRFC7_GPIO10
T19
GRFX6_GPIO9
D11
H10
F10
GRFC3_GPIO6
D9
GRFC2_GPIO5
A8
B8
GRFC0_GPIO3
G23
BT_CLK_GPIO25
F23
BT_SBST_GPIO24
E26
BT_SBCK_GPIO23
E25
BT_SBDT_GPIO22
H21
R19
BT_DATA_GPIO20
Figure 1.15 Schematic of RF Interface of MSM6245
RCV_EN_N
LCD_IF_MODE_1
2K R213
TCXO_EN
PA_ON
TX_QM
TX_QP
TX_IM
TX_IP
DAC_REF
RF
RX_QM
RX_QP
RX_IM
RX_IP
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
- 52 -
Close to MSM
TX_AGC_ADJ
TRK_LO_ADJ