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

L25

 

 

 

 

 

 

 

 

 

 

 

 

 

UART3_RFR_N_GPIO87

H6

 

 

 

 

 

 

 

 

 

 

 

 

 

UART2_DP_RX_DATA_GPIO89

 

 

RCV_EN_N

 

 

 

 

 

 

 

 

 

 

 

 

F18

 

 

 

 

 

 

SYNTH0_GP_PDM0_GPIO92

H18

 

 

 

 

 

 

 

 

Close to MSM

SBST1_GPIO93

LCD_IF_MODE_1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TX_AGC_ADJ

H13

2K

R213

TRK_LO_ADJ

L13

TCXO_EN_GPIO94

F19

TCXO_EN

C246

PA_ON0

F17

PA_ON

TX_AGC_ADJ TRK_LO_ADJ

A12

Q_OUT_N B12

Q_OUT A13

I_OUT_N

I_OUT B13

DAC_REF F12

Q_IM_CH1 W23

Q_IP_CH1 V23

I_IM_CH1 V25W25

I_IP_CH1 AA25

Q_IM_CH0 Y25

Q_IP_CH0 AB25

I_IM_CH0

I_IP_CH0 AC25

GP_PDM2_PA_RAN_GE1 D17 GP_PDM1_PA_RAN_GE0 H17

H15

TRST_N D16

TCK F15

TMS D15

TDI

TDO A17

RTCK H16

TX_QM

TX_QP

TX_IM

TX_IP

DAC_REF

RF

RX_QM

RX_QP

RX_IM

RX_IP

PA_R0

33nF

AUX_PCM_CLK_GRFC14_GPIO80

K19

SPK_AMP_EN

 

 

N21

AUX_PCM_DIN_GRFC13_GPIO14

 

AUX_PCM_DOUT_GRFC12_GPIO103

G4

 

J8

 

AUX_PCM_SYNC_GRFC11_GPIO102

H12

 

TX_ON_GRFC10

 

 

TX_ON

B4

GRFC8_GPIO11

 

T23

 

GRFC7_GPIO10

ANT_SEL1

 

 

T19

GRFX6_GPIO9

ANT_SEL0

 

 

D11

GRFC5_AUX_SBST_GPIO8

 

GRFC4_AUX_SBCK_GPIO7

H10

 

GRFC3_GPIO6

F10

 

GRFC2_GPIO5

D9

 

GSM_PA_BAND

A8

GRFC1_AUX_SBDT_GPIO4

 

 

GSM_PA_EN

B8

GRFC0_GPIO3

 

 

 

BT_CLK_GPIO25

G23

BT_CLK

 

 

F23

BT_SBST_GPIO24

BT_SBST

BT_SBCK_GPIO23

E26

BT_SBCK

BT_SBDT_GPIO22

E25

BT_SBDT

BT_TX_RX_N_GPIO21

H21

BT_TX_RX_N

BT_DATA_GPIO20

R19

BT_DATA

Figure 1.15 Schematic of RF Interface of MSM6245

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Image 51
LG Electronics U250 service manual 11 H/W Sub System, RF Interface, RTR6275WCDMATx, GSMTx/Rx

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