u-blox SARA-R4 Series System Integration Manual

Contents

SARA-R4 series - System Integration ManualUBX-16029218 - R06 System descriptionPage 10 of 1021.3 Pin-outTable 3 lists the pin-out of the SARA-R4 series modules, with pins grouped by function.Function Pin Name Pin No I/O Description RemarksPower VCC 51, 52, 53 I Module supply input VCC supply circuit affects the RF performance andcompliance of the device integrating the module withapplicable required certification schemes.See section 1.5.1 for functional description / requirements.See section 2.2.1 for external circuit design-in.GND 1, 3, 5, 14,20-22, 30, 32,43, 50, 54, 55,57-61, 63-96N/A Ground GND pins are internally connected each other.External ground connection affects the RF and thermalperformance of the device.See section 1.5.1 for functional description.See section 2.2.1 for external circuit design-in.V_INT 4 O Generic digitalinterfaces supplyoutputV_INT = 1.8 V (typical) generated by internal regulatorwhen the module is switched on, outside the low powerPSM deep sleep mode.Test-Point for diagnostic access is recommended.See section 1.5.2 for functional description.See section 2.2.2 for external circuit design-in.System PWR_ON 15 I Power-on input Internal 200 k pull-up resistor.Test-Point for diagnostic access is recommended.See section 1.6.1 for functional description.See section 2.3.1 for external circuit design-in.RESET_N 18 I External reset input Internal 37 k pull-up resistor.Test-Point for diagnostic access is recommended.See section 1.6.3 for functional description.See section 2.3.2 for external circuit design-in.Antenna ANT 56 I/O Primary antenna Main Tx / Rx antenna interface.50  nominal characteristic impedance.Antenna circuit affects the RF performance and applicationdevice compliance with required certification schemes.See section 1.7 for functional description / requirements.See section 2.4 for external circuit design-in.ANT_DET 62 I Antenna detection ADC for antenna presence detection functionSee section 1.7.2 for functional description.See section 2.4.2 for external circuit design-in.SIM VSIM 41 O SIM supply output VSIM = 1.8 V / 3 V output as per the connected SIM type.See section 1.8 for functional description.See section 2.5 for external circuit design-in.SIM_IO 39 I/O SIM data Data input/output for 1.8 V / 3 V SIMInternal 4.7 k pull-up to VSIM.See section 1.8 for functional description.See section 2.5 for external circuit design-in.SIM_CLK 38 O SIM clock 4.8 MHz clock output for 1.8 V / 3 V SIMSee section 1.8 for functional description.See section 2.5 for external circuit design-in.SIM_RST 40 O SIM reset Reset output for 1.8 V / 3 V SIMSee section 1.8 for functional description.See section 2.5 for external circuit design-in.