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原理图(MAX-M8Q_GNSS_HAT_Sch).pdf

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1 2 3 RI DCD DTR DSR TXD RXD RTS CTS R1 R2 4K7 10K USB_5V GND U_TX U_RX 9 12 11 2 1 28 27 26 25 24 23 aveshareW MAX-XXX GNSS HAT 3V3 USB_5V C5 1uF GND V_BCKP C1 0.1uF C2 4.7uF I1 1N4148 R3 1K BAT GND 3V3 5 4 1 2 3 U2 VIN GND EN VOUT BP RT9193-33 Power C6 C7 22nF 104 GND U_RX MAX_TX P_RX U_TX 4 J1 1 3 5 7 2 4 6 8 Header 4X2 U_TX MAX_RX P_TX U_RX Uart Choose Uart&I2C 3V3 VCCB USB_5V USB_5V GND MAX_RXD MAX_TXD P_27 SDA SCL 1PPS I2C P1 1 2 3 4 5 6 7 8 9 10 11 Header 11 A B USB.J1 VBUS D- D+ ID GND SHIELD1 SHIELD2 SHIELD3 SHIELD4 USB 1 2 3 4 5 6 7 8 9 USB_5V 3V3 D_N D_P U1 REGIN VDD RST SUSPEND SUSPEND 7 6 3 8 C4 1uF C3 10uF GND GND GND VBUS D_N D_P 5 4 D- D+ D N G CP2102 9 2 USB TO UART GND 3V3 R4 1K PPS R5 1K R6 1K R7 1K PWR1 TXD1 RXD1 PPS1 MAX_TX MAX_RX GND GND Indicator light BCM wPi C 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 D PI_3V3 P_SDA P_SCL P4 GND P17 P27 P22 3V3_PI P_MOSI P_MISO P_SCK GND ID_SD P5 P6 P13 P19 P26 GND P3 1 2 4 3 6 5 8 7 10 9 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 RPI GPIO 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 wPi BCM 15 16 1 4 5 6 10 11 26 27 28 29 14 15 18 23 24 25 8 7 12 16 20 21 Raspberry Interface 1 2 A B C D VCCB C9 100nF GND MAX_RXD MAX_TXD P_27 SDA SCL 1PPS 47K R8 GND 19 11 20 18 17 16 15 14 13 12 U3 VCCB GND B1 B2 B3 B4 B5 B6 B7 B8 VCCA OE A1 A2 A3 A4 A5 A6 A7 A8 TXS0108EPWR 3V3 C8 GND 100nF 2 10 1 3 4 5 6 7 8 9 MAX_RX MAX_TX P27 P_SDA P_SCL PPS 47K R9 GND Voltage Level Switch H2 1 2 3 GNSS MAX-XX-0 GND 1 2 3 VCC_RF U5 R2 D2 D2 R1 ON/OFF S2 Si1040X 6 5 4 LNA_EN IND1 27nH R12 10K GND RF_IN GND LNA_EN VCC_RF GND P_SDA P_SCL 10 11 12 13 14 15 16 17 18 U4 GND RF_IN GND LNA_EN/RSVD VCC_RF V_ANT/RSVD SDA SCL SAFEBOOT_N RESET_N VCC VCC_IO V_BCKP EXTINT TIMEPULSE RXD TXD GND 9 8 7 6 5 4 3 2 1 3V3 V_BCKP P27 PPS MAX_RX MAX_TX GND R10 10K R11 100K C10 1nF MAX-M8 GND 3 VCC_RF 3V3 C11 1nF C12 C13 C14 4.7uF 10nF 104 GND GND 4
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