LEA-4T_ref_SCH54321J1 R17 RESETDSMB头1 2 3 4 DGNDD36.5 OHM RESET_N5RFR13 R18 1K/1% OHM DGND36.5 OHMU5 MMBT3904LT1 不焊,备选GND GND GND GND50欧 RF0731000103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 D1C11 TXDR2 RXDR8 C12C0.1uF 330 OHM 330 OHM 0.1uF 3_0V 10K OHM RESET_NR161 2 3 4 5 6 7 8 9 10 11 12 13 14RESERVED RESERVED TXD1 RXD1 VDDIO VCC GND VDD18OUT RESERVED RESET_N V_BAT BOOT_INT GND GND LEA-4TR14 R12 AADET 0 OHM L10 OHM DNS3_0VC5V R7 BLM18HD601SN1 C4 10 OHM 2.2uF R1 C8 C9C10 0.1uF DGNDC13 2.2uF 2.2uF 0.1uF 56 OHM 2 VT1 1 1 1 VT2 1 3 3 BC856B BC856BB2DGND25VBJ2 TXD RXD RESET 1 3……
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