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3. TECHNICAL BRIEF
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.11 H/W Sub System
3.11.1 RF Interface
A. RTR6285(WCDMA_Tx, GSM_Tx/Rx)
MSM6280 controls RF part(RTR6285) 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
(WCMDA LB)
(WCMDA HB)
AA1
Y6
XMEM1_CS_N3_SDRAM1_CS_N1_GPIO77
W15
XMEM2_CS_N2_GPIO35
XMEM2_CS_N3_GPIO36
AA15
UART3_RFR_N_GPIO87
L25
N19
USB_RX_DATA_GPIO29
XMEM1_CS_N1_GPIO76
A17
TMS
F15
TRK_LO_ADJ
L13
H15
TRST_N
H13
TX_AGC_ADJ
H12
TX_ON_GRFC10
UART2_DP_RX_DATA_GPIO89
H6
SYNTH0_GP_PDM0_GPIO92
F18
SYNTH2_GPIO65
B6
TCK
D16
F19
TCXO_EN_GPIO94
TDI
D15
TDO
F26
H18
SBST1_GPIO93
AA25
Q_IM_CH0
Q_IM_CH1
W23
Y25
Q_IP_CH0
Q_IP_CH1
V23
B12
Q_OUT
A12
Q_OUT_N
RTCK
H16
SBDT1_GPIO1
PA_ON0
F17
PA_ON1_GPIO2
H11
AB25
I_IM_CH0
V25
I_IM_CH1
AC25
I_IP_CH0
I_IP_CH1
W25
I_OUT
B13
I_OUT_N
A13
LCD_EN_GPIO37
AE13
D11
T23
GRFC7_GPIO10
GRFC8_GPIO11
B4
GRFC9_GPIO12
D5
T19
GRFX6_GPIO9
F8
GP_PDM1_PA_RAN_GE0
H17
GP_PDM2_PA_RAN_GE1
D17
D9
GRFC3_GPIO6
F10
H10
GRFC4_AUX_SBCK_GPIO7
GRFC5_AUX_SBST_GPIO8
GPIO28
A6
GPIO43
H9
GPIO66
F12
DAC_REF
K19
AUX_PCM_CLK_GRFC14_GPIO80
AUX_PCM_DIN_GRFC13_GPIO14
N21
G4
AUX_PCM_DOUT_GRFC12_GPIO103
J8
AUX_PCM_SYNC_GRFC11_GPIO102
J21
CAMCLK_PO_GP_MN_GPIO13
C229
33p
EVLC18S02015
VA200
C230
33nF
2K
R210
0.1u
VREG_TCXO_2.85V
CK
7
6
D
GND
4
3
Q
8
VCC
_CLR
2
1
_PR
_Q
5
C2002
NC7SZ74L8X U1007
R209
10
TCXO_MSM
TRK_LO_ADJ
WM_EN
CHARGEPUMP_RESET_N
BT_UART_RTS
CAM_COVER_DET
CAM_MCLK
JTAG_TMS
JTAG_TDO
JTAG_TRST_N
JTAG_RTCK
DRX_IM
DRX_IP
DRX_QM
DRX_QP
3AXIS_INT
VGA_CAM_PWDN
BT_PCM_CLK
BT_PCM_IN
LCD_LDO_EN
JTAG_TDI
JTAG_TCK
SBST_CTRL
BT_PCM_SYNC
LIN_INVERTER
HP_AMP_EN
RMT_INT
LCD_RESET_N
MICROSD_DETECT_N
TX_ON
PA_R0
ANT_SEL0
ANT_SEL1
RX_IM
RX_IP
RX_QM
RX_QP
BT_PCM_OUT
DAC_REF
PA_ON0
TCXO_EN
PA_ON1
HOOK_SENSE_N
LCD_IF_MODE
TX_QM
TX_IM
TX_QP
TX_IP
ANT_SEL2
MMC_SELECT_N
USB_SELECT_N
LIN_PWM_MAG
ANT_SEL3
Figure. Schematic of RF Interface of MSM6280