H/W Sub System - LG U970 Service Manual

3. TECHNICAL BRIEF

3.11. H/W Sub System

3.11.1. RF Interface
A. RTR6275(WCDMA_Tx, GSM_Tx/Rx)
MSM6280 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
CAMCLK_PO_GP_MN_GPIO13
XMEM1_CS_N3_SDRAM1_CS_N1_GPIO77
UART2_DP_RX_DATA_GPIO89
SYNTH0_GP_PDM0_GPIO92
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
H11
PA_ON1_GPIO2
D5
GRFC9_GPIO12
J21
A6
GPIO28
N19 rev.1.1
USB_RX_DATA_GPIO29
W15
XMEM2_CS_N2_GPIO35
AA15
XMEM2_CS_N3_GPIO36
AE13
LCD_EN_GPIO37
H9
GPIO43
B6
SYNTH2_GPIO65
F8
GPIO66
AA1
XMEM1_CS_N1_GPIO76
Y6
L25
UART3_RFR_N_GPIO87
H6
F18
H18
SBST1_GPIO93
(rev.E) GPIO93 : MICBIAS_SEL deleted
H13
TX_AGC_ADJ
L13
TRK_LO_ADJ
F19
TCXO_EN_GPIO94
rev.1.2
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
GP_PDM2_PA_RAN_GE1
H17
GP_PDM1_PA_RAN_GE0 rev.H
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
Figure. Schematic of RF Interface of MSM6280
CAM_MCLK
MOTOR_EN
VGA_CAM_RESET
VGA_CAM_PWDN
CAM_LDO_EN
LCD_RESET_N
REMOTE_INT
HOOK_KEY_N
KEY_BL_EN
FOLDER_DETECT
TX_AGC_ADJ
2K
TCXO_EN
PA_ON
(WCMDA 2100 PAM Enable)
TX_QM
TX_QP
TX_IM
TX_IP
DAC_REF
RX_QM
RX_QP
RX_IM
RX_IP
PA_R1
JTAG_TCK
JTAG_TMS
JTAG_TDI
JTAG_TDO
JTAG_RTCK
SPK_AMP_EN
SCROLL_EN
TX_ON
ANT_SEL2
ANT_SEL1
ANT_SEL0
GSM_PA_BAND
GSM_PA_EN
rev H
- 52 -
Near to MSM
R214
TRK_LO_ADJ
C246
33nF
JTAG_TRST_N