Linx-technologies RXM-GPS-F4 Manual de usuario

F4 Series GPS Receiver Module Data Guide

– – – –1415NMEA Output MessagesThe following sections outline the data structures of the NMEA messages that are supported by the module. By de

– – – –1617 GSV – GPS Satellites in ViewFigure 15 contains the values for the following example:$GPGSV,3,1,12,28,81,285,42,24,67,302,46,31,54,

– – – –1819VTG – Course Over Ground and Ground SpeedFigure 17 contains the values for the following example:$GPVTG,79.65,T,,M,2.69,N,5.0,K,A*3

– – – –2021100 – SetSerialPortThis command message is used to set the protocol (SiRF binary or NMEA)and/or the communication parameters (baud

– – – –2223103 – Update Rate ControlThis command is used to control the output of standard NMEA messages GGA, GLL, GSA, GSV, RMC and VTG. Usin

– – – –2425104 – LLANavigationInitializationThis command is used to initialize the receiver with the current position (in lattitude, longitude

– – – –2627200 – PowerManagementThis command sets the power mode to Full Power, Adaptive Trickle Power, or Push-to-Fix mode. Figure 29 contain

– – – –2829201 – Poll Software VersionFigure 32 contains the values for the following example to poll the SiRF and Linx software versions:$PLS

– – – –3031211 – SetIOFigure 36 contains the values for the following example to get GPIOA as an input:$PLSC,211,A,0,0*7FThe receiver outputs

– – – –3233213 – WriteOutputFigure 40 contains the values for the following example to write the state of GPIOA to low:$PLSC,213,A,0*61The rec

Warning: Some customers may want Linx radio frequency (“RF”) products to control machinery or devices remotely, including machinery or device

– – – –3435215 – Query: Get Configuration and GPIO Current StateFigure 44 below contains the values for the following example to read the config

– – – –3637Typical ApplicationsFigure 46 shows the R4 Series GPS receiver in a typical application using a passive antenna.A microcontroller U

– – – –3839Board Layout GuidelinesThe module’s design makes integration straightforward; however, it is still critical to exercise care in PCB

– – – –4041Microstrip DetailsA transmission line is a medium whereby RF energy is transferred from oneplace to another with minimal loss. This

– – – –4243Reflow Temperature ProfileThe single most critical stage in the automated assembly process is the reflow stage. The reflow profile in Fi

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– –1DescriptionThe F4 Series GPS receiver module is a self-contained high-performance GPS receiver. Based on the SiRFstar IV chipset, it provides

– – – –23Electrical SpecicationsOrdering InformationOrdering InformationPart Number DescriptionRXM-GPS-F4-x F4 Series GPS Receiver ModuleMDEV

– – – –45GPIOD1GPIOE21PPS3TX4RX5GND21GPIOC6P17/RESET8RFPWRUP9ON_OFF10GND 20RFIN 19GND 18NC 17NC 16GND 22GPIOB 15GPIOA 14G1 13VCC 12P2 11Pin As

– – – –67Time To First Fix (TTFF)TTFF is often broken down into three parts:Cold: A cold start is when the receiver has no accurate knowledge

– – – –89Antenna ConsiderationsThe F4 Series module is designed to utilize a wide variety of external antennas, but care must be taken in ante

– – – –1011Module Power-up SequenceThe module requires a specific sequence to power up and begin normal operation. When power is first applied t

– – – –1213Slow Start TimeThe most critical factors in start time are current ephemeris data, signal strength and sky view. The ephemeris data