u-blox LEA-5 Series Hardware Manual

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u-blox LEA-5 Series Hardware Manual Manual pdf 31 page image

LEA-5, NEO-5, TIM-5H - Hardware Integration ManualGPS.G5-MS5-09027-A2 Released Design-inPage 31 of 68Function PIN No I/O Description RemarksSystem TIMEPULSE 3 O TimepulseSignalConfigurable Timepulse signal (one pulse per second by default).Leave open if not used.EXTINT0 4 I ExternalInterruptExternal Interrupt Pin.Internal pull-up resistor to VCC. Leave open if not used.SDA2 18 I/O DDC Pins DDC Data. Leave open, if not used.SCL2 19 I/O DDC Pins DDC Clock. Leave open, if not used.SCS1_N/NC 17 O SPI MISO/CFG_COM1/Not ConnectedNEO-5Q/5G: Leave open if not used.NEO-5M/5D: not connected, leave open.MISO/CFG_COM1/NC15 I/O SPIConfigurationPinNEO-5Q/5G11: CFG_COM1 is shared with SPI MISO pin. When usingCFG & SPI port, apply configuration settings needed during setup.NEO-5M/5D11: Leave open.MOSI/CFG_COM014 I SPIMOSI/CFG_COM0NEO-5Q/5G11: Leave open if not used. CFG_COM1 is shared withSPI MOSI pin. When using CFG & SPI port, apply configurationsettings needed during setup.Note Connect to GND to use USB in Self Powered mode. SeeSection 1.6.4 and the NEO-5 Data Sheet [2]NEO-5M/5D11: Leave open if not used.NC/SS_N 2 I Not Connected/SPI Slave SelectNEO-5Q/5G: Slave select input for SPI. Leave open if not used.SCK/CFG_GPS0/NC16 I/O SPI Clock/Power ModeConfiguration/Not ConnectedNEO-5Q/5G11: CFG_GPS0 pin shared with the SPI Clock pin. Whenusing Eco Mode and SPI, pull CFG_GPS0 low during startup andthen release it.NEO-5M/5D11: Leave open.Table 6: Pinout NEO-52.4 TIM-5H designThis is a minimal setup for a PVT GNSS receiver with a TIM-5H module.TIM-5HTop ViewGNDRF_INGNDV_BCKP161718192030292827262524232221151413121112345678910RxD2TxD1RxD1ReservedGNDVCCGNDGNDGNDGNDGNDVccMicroProcessor(serial)Passive AntennaReservedTxD2ReservedVCC_OUTRESET_NAADET_NReservedReservedTIMEPULSEReservedEXTINT0ReservedReservedV_ANTVCC_RFBackupBattery +Figure 17: Passive antenna design for TIM-5H receivers11Internal pull-up to define default CFG_xxx configuration during startup. Leave open if default setting is ok and pin not otherwise used. Forother configurations apply the required pin settings during startup.