用过Ublox的GPS接收模块的请帮忙看一下

LEA-4T_ref_SCH5

4

3

2

1

J1 R17 RESET
D

SMB头
1 2 3 4 DGND
D

36.5 OHM RESET_N

5

RF

R13 R18 1K/1% OHM DGND

36.5 OHM

U5 MMBT3904LT1 不焊，备选

GND GND GND GND

50欧 RF

0731000103

靠近RF线摆放
L2 DGND CBW453215U190 U1 SMP75-8DGND TIMEPULSE EXTINT0 USB_DP USB_DM VDDUSB RESERVD RESERVED EXTINT1 AADET_N V_ANT VCCRF GND RF_IN GND 28 27 26 25 24 23 22 21 20 19 18 17 16 15 R9 33 OHM 1PPS CLK D1

C11 TXDR2 RXDR8 C12
C

0.1uF 330 OHM 330 OHM 0.1uF 3_0V 10K OHM RESET_N

R16

1 2 3 4 5 6 7 8 9 10 11 12 13 14

RESERVED RESERVED TXD1 RXD1 VDDIO VCC GND VDD18OUT RESERVED RESET_N V_BAT BOOT_INT GND GND LEA-4T

R14 R12 AADET 0 OHM L1

0 OHM DNS

3_0V
C

5V R7 BLM18HD601SN1 C4 10 OHM 2.2uF R1 C8 C9

C10 0.1uF DGND

C13 2.2uF 2.2uF 0.1uF 56 OHM 2 VT1 1 1 1 VT2 1 3 3 BC856B BC856B
B

2

DGND

2

5V
B

J2 TXD RXD RESET 1 3