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原理图(NEO-M8T_GNSS_TIMING_HAT_Sch).pdf

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1 USB.J1 VBUS D- D+ ID GND SHIELD1 SHIELD2 SHIELD3 SHIELD4 USB D_N D_P USB_5V 1 2 3 4 5 6 7 8 9 GND USB aveshareW NEO/LEA-XXT GNSS TIMING HAT 2 USB_5V U1 1 2 3 VIN GND EN VOUT BP RT9193-33 C1 1uF GND 3V3 5 4 C2 C3 22nF 100nF GND 3 3V3 I1 1N4148 R1 1K V_BCKP Uart & I2C C4 4.7uF C5 100nF BAT 4 P1 3V3 VCCB USB_5V USB_5V GND NEO_RXD NEO_TXD P_27 SDA SCL 1PPS 1 2 3 4 5 6 7 8 9 10 11 Power GND 3V3 R3 1K R4 1K PPS R5 1K TXD1 RXD1 PPS1 R2 1K PWR1 NEO_TX GND NEO_RX GND Indicator light BCM wPi P2 wPi BCM 2 3 4 17 27 22 10 9 11 5 6 13 19 26 8 9 7 0 2 3 12 13 14 21 22 23 24 25 P_3V3 P_SDA P_SCL P4 GND P17 P27 P22 3V3_P P_MOSI P_MISO P_SCK GND ID_SD P5 P6 P13 P19 P26 GND 2 1 4 3 6 5 8 7 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 PPS USB_5V USB_5V GND P_TX P_RX P18 GND P23 P24 GND P25 P_CE0 P_CE1 ID_SC GND GND P12 GND P16 P20 P21 15 16 1 4 5 6 10 11 26 27 28 29 14 15 18 23 24 25 8 7 12 16 20 21 RPI GPIO Raspberry Interface 1 2 H1 1 2 3 GNSS VCCB C7 100nF GND NEO_RXD NEO_TXD P_27 SDA SCL 1PPS 47K R6 3V3 C6 19 11 20 18 17 16 15 14 13 12 U2 VCCB GND B1 B2 B3 B4 B5 B6 B7 B8 VCCA OE A1 A2 A3 A4 A5 A6 A7 A8 2 10 1 3 4 5 6 7 8 9 GND 100nF NEO_RX NEO_TX P_TX P_RX P27 P_SDA P_SCL PPS 47K R7 GND TXS0108EPWR GND D_N D_P R9 R10 22R 22R Voltage Level Switch R8 NC GND PPS P27 D1_N D1_P 3V3 3V3 VCC_RF GND GND 1 2 3 4 5 6 7 8 9 10 11 12 U3 SAFEBOOT_N D_SEL TIMEPULSE EXTINT USB_DM USB_DP VDD_USB RESET_N VCC_RF GND RF_IN GND GND VCC V_BCKP RXD/SPI_MOSI TXD/SPI MISO SCL/SPI CLK SDA/SPI_CS_N RESERVED RESERVED RESERVED LNA_EN GND NEO-M8 P_TX P_RX 24 23 22 21 20 19 18 17 16 15 14 13 GND 3V3 V_BCKP NEO_RX NEO_TX P_SCL P_SDA LNA_EN GND GND 1 2 VCC_RF 3 U4 R2 D2 D2 R1 ON/OFF S2 Si1040X 6 5 4 LNA_EN IND1 27nH R13 10K R11 10K R12 100K C13 1nF VCC_RF 3V3 C8 1nF C9 C10 C11 C12 10uF 4.7uF 10nF 100nF GND 3 GND GND NEO-M8 4 A B C D A B C D
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