H/W Sub System - LG CU500 Service Manual

3.11 H/W Sub System

3.11.1 RF Interface
A. 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_ON0, 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
U200-1
MSM6275_A
XMEM1_CS_N1_GPIO76
XMEM1_CS_N3_SDRAM1_CS_N1_GPIO77
UART3_RFR_N_GPIO87
UART2_DP_RX_DATA_GPIO89
SYNTH0_GP_PDM0_GPIO92
GP_PDM2_PA_RANGE1
GP_PDM1_PA_RANGE0
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
Figure. Schematic of RF Interface of MSM6275
- 47 -
3. TECHNICAL BRIEF
GPIO43 FOLDER_DETECT
B6
SYNTH2_GPIO65 HOOK_SENSE_N
F8
GPIO66 KEY_COL(6)
AA1
Y6
L25
H6
F18
SPK_AMP_EN
H18
SBST1_GPIO93 UART_RFR_N
H13
TX_AGC_ADJ
L13
TRK_LO_ADJ
F19 TP201
TCXO_EN_GPIO94 TCXO_EN
F17
PA_ON0 PA_ON0
(WCMDA 1900PAM Enable)
A12
Q_OUT_N TX_Q_M
B12
Q_OUT TX_Q_P
A13
I_OUT_N TX_I_M
B13
I_OUT TX_I_P
F12
DAC_REF 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 JTAG_TMS
D15
TDI JTAG_TDI
A17
TDO JTAG_TDO
H16
RTCK JTAG_RTCK
K19
LCD_RESET_N
N21
G4
J8
H12
TX_ON_GRFC10 TX_ON
B4
GRFC8_GPIO11 ANT_SEL2
T23
GRFC7_GPIO10 ANT_SEL1
T19
GRFX6_GPIO9 ANT_SEL0
D11
GSM_TX_VCO_0_EN_N
H10
GSM_TX_VCO_1_EN_N
F10
GRFC3_GPIO6 UHF_BAND_SEL
D9
GRFC2_GPIO5 GSM_PA_BAND
A8
B8
GRFC0_GPIO3
G23
BT_CLK_GPIO25
F23
BT_SBST_GPIO24
E26
BT_SBCK_GPIO23
E25
BT_SBDT_GPIO22
H21
BT_TX_RX_N_GPIO21
R19
BT_DATA_GPIO20
A22
MDDIC_DATP
A23
MDDIC_DATN
B22
MDDIC_STBP
B23
MDDIC_STBN
Near to MSM
1K R118
TX_AGC_ADJ
2K R119
TRK_LO_ADJ
C146 C147
0.01u 0.033u
VREG_MSMP_2.7V
RX0_Q_M
RX0_Q_P
RX0_I_M
RX0_I_P
PA_R0
JTAG_TRST_N
JTAG_TCK
GSM_PA_EN
UHF_VCO_0_EN
BT_CLK
BT_SBST
BT_SBCK
BT_SBDT
BT_TX_RX_N
BT_DATA